I thought you might be able to figure this out but anyhow.replaced with your file, but i don't really understand what else to do "Adapt in rotations heal the blackmage". Anyway he's still not healing himself.
In
\Routines\UltimaCR\Rotations\Behaviors\Heal
Exachange The Blackmage.cs with the attached one.
View attachment BlackMage.cs