How do I quickly regain health during combat in Mass Effect: Andromeda?

The best combination you can do with the bio converter is tech skills.

Specifically, life support:

Life Support: Improves health regeneration rate for the user and nearby squadmates and tech constructs for 3 sec after using a tech power.

Health Regeneration Bonus: 200%
Health Regeneration Cap: 50%

This will let you spam tech skills to constantly recharge your health.

Here is an example (gifv file) of someone using an bio converter Dhan with life support:

http://i.imgur.com/NI7zcse.gifv