Been playing prot/holy lately, and it’s one of the best specs in game
Setup: Go deep prot, picking up every talent that boosts defense in any way, and rest in holy and then put on holy gear with resillience along with glyph of divine plea and salvation(?) (20% reduction glyph).
Result (for me): About 62% armor, 1,1k res, holy shield for many blocks, divine plea that gives endless mana, blessing of sanctuary for another 3% (?)dmg reduction, 3k spellpower that makes sacred shield absorb most damage that gets through.
It literally is god mode.