If it wasn't for the blazer that Raze had obtained, he was pretty sure that he would have been dead by now. Already, the healing effects of just wearing the blazer had saved him.
Although the healing was minimal, especially while in combat, he just needed that little help to allow him to breathe just a little bit, giving him more air so his muscles could work the way they were meant to.
There was a difference between the fight with Feebie and the one with Dame. For one, he was getting hit more, and the strikes were more powerful. At the same time, due to being in a tense situation and fight, he was finding it harder to control his Qi. He was desperate, overloading himself, pushing his Qi more than it could really go, hurting himself more.