I’ve done my best to find one, I’ve tried:
- Giving DT Order and holding Law
- The Blood of Terra
- Changing COMs to increase/decrease DT’s max health
- Shooting DT’s shock ball with a Moxxi weapon/holding a moxxi weapon in general
None of those were able to heal DT in any way. I’ve seen people say Maya can heal DT, but that doesn’t fit my needs.
(EDIT) This is for a pure DT melee build, so healing shields are out of the equation unless they provide roid damage. Other edits are from adding things to the above list.