I found your necro warfare build really impressiv. The guy that answered you in the comments of your video made me giggle, one shot the last boss lol ?
Anyway, I will try it out.
My build has almost come to an end and it mostly relies on stacking armor -> jump onto the pack of enemies -> overpower -> armor explosion + whirlwind and rip every enemy.
But necro looks way more fun ! Plus the fact that every necro spells can cost less with the proper talent since you're always standing on blood is cool !