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Originally Posted by cdrcjsn Yeah, but not all of a battlerager's attacks have the invigorating keyword, nor is invigorating just a battlerager's thing since other fighters can use it. They stack, so this just means that he gets more temp HPs when he uses invigorating keyword attacks. |
It's not really the stacking of temp hit points that is the problem. That's nice and all but I don't think that's what ultimately makes them so overpowered and imbalanced.
IMO, it's the temp hit points gained every time someone attacks that is the problem. It mitigates far too much damage, not just throughout an encounter, but per attack, to be even remotely balanced.
A first level fighter with an 18 Con and the Improved Vigor feat is effectively immune to melee-based minion attacks from minions up to around 7th-level.
That's just patently ridiculous and broken.
Making it only happen once per round, however, makes it reasonable and still a very nice boon.