I've got a really fun run going here, with a blooming staff of Blast Wave and platemail of camouflage. Normally those enchantments are not the best, but the combination of knockback, creating grass, and Invisibility when trampling is both tactically amazing and enormous fun.

But which ring should I use? I can't seem to decide.

I have some SoU's, so whatever ring I use, I'll probably upgrade it to +3.