Suicide R2.
This is not an illicit but a salvaged Astromech.
Treat as a proton bomb. 5 points. That is all. Discard after use.
Maybe like a dead mans switch. Or if you want to go more crazy when ever ship receives a face up ship direct hit damage card deal 1 face up damage card to every ship at range 1 then remove ship.
Nah. I like to think of it as the pilot ejecting a droid full of thermal detonators behind it into a group of ships. squeak-shrieking as it goes kaboom.
If that's what your going for how about this?
I would just make the salvaged Astromech a Proton Bomb:
R2-P99 (Or Some other name)
Salvaged Astromech
4 points.
The Astromech counts as a Proton Bomb and follows the rules from Bombs.
this is simple an allows non bombers to have a bomb. Without totally changing the rules.
That works for me.