O skills usage

[Willshaper]

On what piece of gear does exorcism spawn? Didnt see that oskill and ive been crafting a lot

Exorcism spawns on Paladin Blunt Weapons and Necromancer Shields.

You can check where affixes can spawn here: http://docs.median-xl.com/doc/wiki/affixes

[Crash]

There's a paladin runeword with it as well.

[RollsRoyce]

if you want to use that skill i recommend a crafted +20 exorcism, +4-5 pala skills with life after kill, probably abandonned blessed for attack rating if you need some