PoE IWantAGoodDoggo builds

I'm looking to make a divine ire bossing build. 40% damage while channeling doesn't do much against bosses but damage looks OK I'm looking for things I could incorporate to either increase damage and cast speed in expense of defences for bossing. But also I'd like to make a variant for slow mapping investing on defences (I have no idea how to do this but I'd have to drop doryani I guess).