What about:
Cobalion @ Para-flinch
Nature: Jolly/Impish
Item: Leftovers
Ability: Justice heart
Ev's: 152 Def / 100 Sp.def/ 252 speed / 4 Attack
Thunder wave
Iron head
Sacred sword/ Close combat
Roar/ Taunt
T-wave goes great on Cobalion. Great speed + the fact he has Stellar defence is a great plus 90 base attack may not seem much but when combined with STAB Iron head can actually do quite a lot. Para - flinch can be really annoying. Sacred sword is the preferred secondary STAB move, although Close combat can be used if you want the extra power, although it comes with a defence drop. Roar can be added for the extra annoyance of a para - shuffler as well. Taunt can be used to stop faster pokes from taunting you and stopping you from T-waving the oppenent.