Proxy[1] aka Nydhorgg's Shadow Garb[1] is an item that give you 7% redux from everything so today i write this for ppl who want to get it

Step 1: Onward to New World Quest
Credit to LaxWasHere who found out how to skip most of this quest. This is all you have to do:
-Warp to Munkenro at moc_fild22b 230 197, talk to him and there will be an announcement. Start killing the Mobster-like monster until there is another announcement. Back to Munkenro and talk to him. Grat 1st quest done (If Munkenro refused to talk or else chance is another person is doing this part, just w8 till your turn)
http://irowiki.org/ow/images/b/bb/Moc22b.jpg

Step 2: New Surroundings
http://irowiki.org/wiki/New_Surroundings
-Talk to Marian (mid_camp 222 283)
-Talk to Instructor Lugen (mid_camp 261 284)
-Enter the building (mid_camp 215 247) and talk to Receptionist Brink
-Return to Lugen (mid_camp 261 284)
-Speak to Diego (mid_camp 264 263) and choose to help him
-Hunt 20 strong vines from Nephentes in man_fild01-03. Then go to spl_fild02 at (232 143), (306 152), or (379 197) there is a tree in each place keep clicking it until u got 20 ordinary branch (any tree will do in those places).
-Back to Diego and talk to him. Then click on the one of the 2 posts near the portal and choose the sequence "Attach the Tree Bar"---->"Tie it with vines." keep doing that until there is a new option "Knot it" choose it. Repeat it again for the other post. Then speak to Diego.
-You will be warped into a room, speak to Lucas.
-Return to Lugen (mid_camp 261 284).
-Return to Marian (mid_camp 222 283) and return to Lugen (mid_camp 261 284) again.
-Talk to Jan (mid_camp 162 298)and return to Lugen (mid_camp 261 284) again. (.sigh)
-Talk to Gerard (mid_camp 30 168) and return to Lugen (mid_camp 261 284) again. (.swt)
-Talk to Alberto (man_fild01 80 248) and return to Lugen (mid_camp 261 284) for another freaking time. (seriously)
-Keep talking to him until he gives you a letter.
-Deliver the letter to Otto (mid_camp 123 290) and back to Lugen (mid_camp 261 284) (last time). Talk to Lugen, 2nd quest done.

Step 3: Pursuing Rayan Moore
Ok in this step u only have to complete 1 quest in a set of 3 "mini quests" so no need to complete all. My choice is Pursuing Rayan Moore because its simple (I know that u guys dont want to hunt Tendrillion or fishing all day).
http://irowiki.org/wiki/Pursuing_Rayan_Moore
Items requirement: 30 Rune of Darkness (odin_temp01-03), 30 Bloody Rune (ra_san01-05), and 30 Holy Water (buy or make)
-Talk to Echinacea (mid_campin 68 185)
-Talk to Kidd (mid_camp 199 311) then get to morocc 46 107, enter the building talk to the bartender and ask about information then enter and go into the room to the south. Speak to Rin (que_job01 84 17)
-Talk to the pile of dirt at (hu_fild04 235, 103), and investigate it closely. You will receive a Crystal of Feardom.
-Return to Rin (que_job01 84 17) and get to Kidd (mid_camp 199 311)
-Talk to Kidd (mid_camp 199 311) and u will be warped into a different map
-After a short dialogue, you will start to battle several Dandelion Members. There is a time limit on this battle. After killing them, talk to the corpse (que_dan01 49, 36).
-Talk to Kidd (mid_camp 199 311) then get to Echinacea (mid_campin 68 185)
-Get to Defaria (mid_camp 256 272) and give the items
-Talk with Kidd, then use the scroll you will be warped to (yuno_fild09 255 127), walk up the hill and go into the building (yuno_fild09 234 133). Walk behind the curtain at the back of the building. After some conversation, you will be returned to your save point.
-Talk to Kidd then Return to the house (yuno_fild09 234 133) and enter the basement.
-Speak with the man (que_dan02 115 53) at the back of the basement.
-Return to Kidd in the new world, he gives you a journal to take back to Rin.
-Return to Rin, she will give u a tracking number (important memorize the number or write it down somewhere)
-Speak with Echinacea, she asks for the tracking number
-Speak with her again then talk to the Manager (mid_camp 191 206)
-Return to Echinacea to report the results

Step 4: Report from the New World
http://irowiki.org/wiki/Report_from_the_New_World
This 1 maybe the hardest part of all so prepare to rage >:D
-Talk to Hibba Agip (mid_campin 90 114)
-Talk to Staff Officer Abidail at the east end of the table,
-Talk to Hibba Agip again
-Talk to Expedition Messenger (mid_camp 206 286) and while you are discussing the report, someone sneaks up and attempts to take it. If you attempt to portect the report from the attacker, it will be easier later to re-assemble the report later.
-Return to Hibba Agip (mid_campin 90 114) then talk to Staff Officer Abidail, he will asks you to bring him 10 pages of the report
-Speak to any of the Expedition Scout on the New World field maps. (spl_fild02 296 369, spl_fild03 172 71, man_fild01 316 92, man_fild03 202 251)
-Keep choosing the first option and repeat until u got a large amount of pages (50-100) if the scout didnt give u after many attempts try a different 1 in the list above.
-Return to Abidail (mid_campin 90 114) and he will assemble the pages for you. Tip: for every volume u received from him put it immediately in your storage so u can receive an extra copy so the next time u do the quest u dont have to gather the pages.
-Talk to Abidail if u got all 4 volumes if not keep talking with the scouts for more pages.
-Talk to Hibba Agip
-Deliver a report to Laur in the throne room of Prontera Castle (prt_castle 88 165)
-Deliver a report to Nuria outside Rachel's temple (ra_temple 122 174)
-Deliver a report to Gerhart at the front desk, inside Rekenber Corporation's Headquarters (lhz_in01 110 174) this 1 you can't warp so have to walk. Its the large building in top left of lighthalzen.
-Back to Hibba Agip (mid_campin 90 114). Quest done.
Step 5: Ring of the Wise King
http://irowiki.org/wiki/Ring_of_the_Wise_King
-Talk to Schwartzvalt Mechanic (mid_camp 197 237) and then Arunafeltz Linguist (mid_campin 168 82)
-Talk to the Small Fairy (spl_fild02 34 223).
-Talk to the Camp Guard Captain (mid_camp 212 237).
-Talk to the Tree Giant (man_fild03 236 105).
-Return to the Camp Guard Captain (mid_camp 212 237).
-Return to Arunafeltz Linguist (mid_campin 168 82)
-Copy the text in the box
-The Faerie's text is:
RLGHLRXLA TKANTLFDMS
WJACK TNAHRDNJSDMFH
WLSGHKWND !!
-The Giant's text is:
TJDTMFJDNS CJFDI
TKADLFDMF QKATOS
EKDTLSDML DLFMADMS..
-Talk to Rune Midgart's Magician (mid_camp 147 256).
-Talk to the Gem at (spl_fild02 26 218). Several thief bugs will spawn, kill them. Repeat until you obtain a Red Jewel from it.
-Talk to the Gem at (man_fild03 227 109) same like above repeat until u get the Blue Jewel
-Return to Schwartzvalt Mechanic (mid_camp 197 237) then to Arunafeltz Linguist (mid_campin 168 82)
-Back to Schwartzvalt Mechanic (mid_camp 197 237) again.
-Go to man_fild01-03 look for the mysterious rocks scattered around in the map and talk to it. Attempt until you get 1 Unidentified Mineral then return to Schwartzvalt Mechanic (mid_camp 197 237)
-Return to to Rune Midgart's Magician (mid_camp 147 256).
-Take the gem to Schwartzvalt Mechanic (mid_camp 197 237) and wait 1 hour.
-After 1 hour passed talk to the mechanic and congratulation you got Ring of Wisdom.

Step 6: Guardian of Yggdrasil
http://irowiki.org/wiki/Guardian_of_Yggdrasil
-Speak to Yggdrasil Gatekeeper at (nyd_dun02 99 199).
-Talk to Hibba Agip (mid_campin 90 114).
-Talk to Historian Magnifier (mid_camp 271 299).
-Talk to Assistant Naomi (prt_in 171 94) choose to help her.
-Return to Historian Magnifier (mid_camp 271 299) and choose either Laphine or Sapha (You must equip the Ring of Wisdom to be able to talk with them)
+Laphine: Talk to the Grumbling Soldier in the Splendide (splendide 198, 178), and ask him about the tree. Inside the central building (splendide 197 191), speak to the Laphine Commander (spl_in01 110 60).
+Sapha: Talk to the Laphine Prisoner (man_in01 291 62). Talk to Neat Etorr (man_in01 311 57) in the same building.
-Return to Historian Magnifier (mid_camp 271 299) and then Hibba Agip (mid_campin 90 114)
-This step depended on which side you choose earlier:
+Laphine: Speak to the Laphine Commander (spl_in01 110 60), and threaten to ask the Sapha's help then talk to Aide Arioss (spl_in01 104 56).
+Sapha: Return to the building in Manuk and talk to Neat Etorr (man_in01 311 57) again. Talk to the Laphine Prisoner (man_in01 291 62) twice.
-Now you can enter Nidhoggur's Nest.

Final Step: Nidhoggur's Nest
Its time to have a showdown with Nidhoggr's Shadow. Magic class is a no no here because of Nidhoggr's high mdef, he is shadow lv4 which resist most elments 75% and the fact that he can reflect magic back to you ouch. You can use Warlock though, white imprison him and chain lightning but be careful of the reflection.
I recommend these 3 classes for you. (Rebirth wont hurt)
-Guillotine Cross: Why? Exceeding cloak allows you to walk past the whole dungeon w/o being detected by the mobs plus highest damage output per second. Equipment recommend: right hand main gauche [4] (2 abyss knight 2 paper) left hand orc axe [4] ( 1 abyss knight 1 turtle general 1 santa poring/ earth petite 1 minorous) Asperio, Armor with Ghostring and tons of berries
-Ranger: The Warg allows you to move fast and deal deadly damage plus stun lock enemies from faraway. Equipment recommend: composite bow [4] ( 2 abyss knight 2 turtle general) holy arrow, Ghostring armor and berries.
-Sura: Uh these guys no need to introduce them, Gate of Hell + Tiger Cannon are infamous OP. Tiger Cannon 1st then GOH follow to deal super damage. Equipment recommend: barrage fist [4] (2 abyss knight 1turtle general 1 santa poring/ earth petite) Golden Thief Bug shield and berries
-You need a party with 2 or more ppl to enter the instance (the other member dont need to online and the party leader must complete the quests above).
-Certain items like Vital Three Shoes and Dead Three Cane only be farmed here.
-After entering the dungeon run like hell to the right side and find a way to go up, locate the Murdered Yggdrasilid near the center of the main room (213,277).
-Talk to her and 12 Nidhoggr's Guardians will be summoned, they look like the Phylla and Rhyncho mobs. They are scattered around the big area so try to locate and kill them before time run out (30 mins). GX use exceeding cloak, Ranger use Warg Ride while Sura use Snap for faster searching. After 12 guardians were killed there will be an announcement and the portal will open near the waterfall, get into the portal.
-This part is a maze. Follow the instruction in this picture to go past it http://irowiki.org/ow/images/9/93/2%40nyd.png
-Enter the panel and you will be warped to the lair
-Nidhoggr's Shadow is waiting for you. Time to defeat him. Be careful he may use earthquake which deals extremely high damage and may insta-kill.
-Thats it good luck farming, farmers. :D