After play testing the team for a while, here are the changes that I came up with:

~ Gave Breloom a bulkier EV spread of 236 HP / 252 Atk / 20 Speed
~ Changed Thunderbolt to Will-o-Wisp on Rotom-W
~ Changed Excadrill's nature and item to Adamant + LO
~ Changed Drgonite's EV spread to 64 HP / 252 Atk / 192 Speed
~ Replaced Landorus with a double dancing Balloon Terrakion
~ Gave Tyranitar a new set

Tyranitar @ Leftovers
Sand Stream ll Careful
252 HP / 80 Sp. Atk / 176 Sp. Def
~ Crunch
~ Superpower
~ Ice Beam
~ Stealth Rock

Here are my reasons for the changes

I gave a Breloom a new EV spread because your one was aiming to outspeed an Adamant max Speed Tyranitar (which no one really uses), so I went over the speed tiers, and it turns out there isn't much point in running Speed on Breloom because everything that hangs around the 239ish benchmark beats you anyway (i.e. Rotom, Scizor, Gliscor, Magnezone). So I just dumped it all in HP, and now it's able to tank more stuff like Excadrill and set up on crap like Ferrothorn.

I changed Thunderbolt to WoW on Rotom-W because I was barely using Thunderbolt (I spent most of my time spamming Spec'd Volt Switches and Tricking stuff lol) and it's nice burning annoying stuff like specially defensive Scizor.

Jolly Balloon Exca is weaker than a wet carboard box because it can't hurt anything worth a damn >_>  You already have enough Exca checks (Loom, Rotom, Terrakion, ES on Dnite), so there's no point in running Jolly + Air Balloon Exca. Just trust me on this one if you're feeling iffy bro, just try it.

Don't worry about the Dragonite EV spread change k lol, it was just speed creep stuff.

I ended up replacing Landbro because it just wasn't hitting hard enough and it could barely sweep with a RP under its belt. I just didn't know what to do with Landlos tbh? =/  I threw Terrakion in as a temp. replacement because I wanted someone else to abuse the SS, but I haven't had the chance to use Terrakion in a lot of my matches, so I can't really give a unbiased opinion on how well he performs. In all honesty, I really do think that this spot could be reserved for something that strengthens your teams core a bit more or you can throw in something else in this spot to aid Exca in sweeping. We can both hop online and talk to Kao about this one if you'd like?

Lastly, I ended up completely revamping Tyranitar's old moveset for a couple of reason:

1) Letfovers was severely needed to tank DMs from the Lati twins because you lack a Steel type (no Excadrill doesn't count because it's frail >_> so shaddup before you say anything lol)
2) Too many random things ended up walling it (Arcanine, Heatran, Terrakion <-- this guy can actually set up on your Tar :/ ), well yeah, you get my point.
3) This new EV spread ensures that you outspeed every single other specially defensive MixTar out there, which is actually pretty huge because you can smack them with a Superpower for a OHKO preventing them from getting SR up.
4) You still deal like an average of 99% against the standard Gliscor with Ice Beam, so don't worry about the -Sp. Atk nature, you OHKO it with SR anyways.

I'll do some more matches later on to get a better feel for the team.