A valid point actually, I've no special attacker t' fall back on; however, I'm pretty sure Garchomp can handle said tanks regardless of their EV investments. If they focus on an attack stat, Outrage will just mow 'em down, resistance or not. If they're EVed solely for bulk, Garchomp can substitute up on 'em, grab an SD or two and ravage. Haxchomp is basically my tank killer thanks to that 30% evasion and SubSD.
Also, the reason I carry both Excadrill and Garchomp are because they perform the same duty of "spam physical STAB". Both of 'em are ridiculously scary when boosted. If they don't smash through the foe on their own, the other will clean up through brute force. Having a special attacker would obviously be more efficient and less risky, but the question is; what special attacker is as fast, bulky and strong as these two? The boosts from Sandstorm outweigh the disadvantages of goin' exclusively physical IMO.
'Less you've got an idea of some specially oriented Poke that is ridiculously synergistic with TTar and 'Chomp/'Drill and therefore worth the change from aggrofaggotry to a feasible core, I've no plans to change the team itself.
That aside... item/move recommendation pl0x?