Sorry about the necro-post.
The framework setup is pretty much prepped for you to just plug in your non-Armor damage primary/secondary.
I don't really dig into damage output, etc. Calculating that's way more involved and I figure that an invulnerable potato, even doing almost no damage is still...well...INVULNERABLE.
Sure, fighting to a standstill isn't satisfying. But, if you're a Tank, an utter standstill is still a win IMNSHO.