The way I see it, if your Mirror Images absorb three hits, that's three attacks that didn't hit you. It's a level 2 spell. I still summon Spiritual Weapon at level 2 in the late game, even though it can only absorb a couple hits from enemies. The Raven and Dire Raven my Ranger summons similarly can't take many hits. But again - every hit they take is one YOU didn't have to take. Enemy NPCs don't save their biggest attacks for later - they use their worst stuff every time it's available. Let them waste those actions on magical summons. smile

[Linked Image from coloden.com]