Another idea is to call it "regenerative armor," to reflect that it's more like regenerative shielding. I'd like to see your mechanic for that component.
I went back to the Starships book to figure out how to work the mechanic of transphasic torpedoes. The description of the Borg cube would indicate that the Narrator basically decides when the PC's weapons no longer affect the cube. Perhaps transphasic torpedoes act as Quantum torps, but are immune to Borg adaptation.
Just a thought.
Davy Jones
"Frightened? My dear, you are looking at a man who has laughed in the face of death, sneered at doom, and chuckled at catastrophe! I was petrified."
-- The Wizard of Oz