Hmm, I would say to put your EV's like this,
252 Sp Def 160 Atk 96 Hp
Item: Leftovers
Role: Tank
Moveset:
Iron Head ( Pretty basic )
Sacred Sword ( Signature move! )
Swords Dance ( Lets actually do something )
Stone Edge / X-Scissor ( More Coverage )
OR
160 Sp Def 252 Sp Atk 96 Hp
Item: Leftovers
Role: Tank
Flash Cannon ( STAB )
Focus Blast ( STAB )
Calm Mind ( Special Tanking )
HP Water ( Coverage )
I personally Prefer the first set, but the second one isn't bad if you don't want something physical, I figured I would go ahead and give a special set aswell.