Boss Rush Speedrun

Run: https://www.twitch.tv/videos/208369336 // (soul) indicates you need to use a soul at some point of the boss fight, usually at the end.
Start Mercenary
Pick Sovereign Soul as your gift
Kill Wyvern, pick up the soul (soul)
Kill Yhorm (soul)
Bone Back
30(33) Dex, Sell Souls, 3 GPB, 12 Titanite and 12 Large, 2 Chunks, 1 Sharp Gem, Small Leather Shield, Grass Crest Shield. +7 Twinblades, Sharp Gem Infuse, Allot Estus
Kill Sage (Parry // 7 L1's)
Kill Vordt (Use GPB, 6 L1's) (soul)
Kill Wolnir (3-4-3)
Kill Greatwood (2 souls)
Kill Deacons (GPB, 6 L1's) (soul)
Kill Gundyr (GPB, Parry, 3L1's) (soul)
Bone Back
12 Vig, 13 End(only if picked the Wyvern soul), 40 Dex, 14 GPR, 15 Bundles, 1 Pale Pine, 1 Human Pine, Rings (Stam Ring, Pris Chain, Lloyd's Sword, Pontiff's Eye)
Kill Watchers (GPR)
Kill Pontiff (Use GPB, Parry, Rip, Use GPB, 1R1, Parry, RIP, L1's) (soul)
Kill ODK (GPB) (soul)
Kill Dancer (GPR) (soul)
Bone Back
13 Endurance(if didnt level before), 10 Chunks, 1 Slab. +10 Twinblades
Kill Aldrich (GPB)
Kill Ocerios (GPR) (soul)
Kill Gundyr (GPB) (soul)
Kill Nameless (HPR) (soul)
Kill DragonSlayer (PPR) (soul)
Kill Princes (GPR) (soul)
Bone Back
Level 27Vig 29End
Kill Halflight (GPB + GPR)
Kill Gravetender (GPR)
Kill Friede (GPR + GPB)
Kill Demon Prince (GPR)
Kill Midir (GPB)
Kill Gael (GPR)
Kill SoC (GPR)