sifu sifu sekalian all pls help check my gear see whats wrong, i got slapped hard by t5 mobs like im slapping t1 mob

this my gear
http://us.battle.net/d3/en/profile/Zoldane...0/hero/10012786

- i swap helmet with aughilds when im fighting elites
- i swap neck to the anti arcane neck if disco starts
- i swap neck to blackthorne while fighting non disco lights elites

but still, what is wrong? plz help