I notice when a Goblin uses Bomb Toss or when a Crab uses Bubble Shower at 85%+ health it'll do AoE 200-300 DMG, but when the same mobs use those moves when they're near death it does like 10-30 damage to everyone. So I'm thinking that maybe the accuracy or potency of certain magic based tp moves are based on current HP, but this would only hold true for breath attacks i think.