Ran Vet Banished Cells 2 found some problems in Combat Metrics. Getting 0 heals from Sap Essence and Blood Mist from the CMX, I did have trouble with staying alive.
What does your healing tab show for the heals for the overall fight? The damage tab isn’t going to be particularly relevant here, and your CMX combat log shows only three seconds of the fight. If the targets were at full health at those particular timestamps, they can’t get any more hp.