If the BFC "Warzone" is in play, can I PERPLEX up the damage of my medic? Attack and Defense values can't be modified during SUPPORT, but how about Damage?

Check the wording of War Zone

A character using Support does not roll one six-sided die when targeting another character; instead, it heals the target of damage equal to its unmodified damage value.

So no, perplexing the medic's damage would not increase the amount of healing done.

If I'm not mistaken, War Zone also says that the healing amount is the Support character's unmodified damage value.

War Zone says --
So the answer is already there. You cannot use Perplex, as it modifies your damage value.

Has anyone mentioned the "UNMODIFIED" damage value.

So much for trying to go by memory. Thanks!

Umm... Warzone states "unmodified".