I think the Skitarii Blitz, should not eat up a grenade - as they are not strong enough to justify its value compared to what someone like Hive Scum get out of them.
- The Arc Grenades should cost 2 or 3 capacitance, so that they cannot be spammed. That, or 1 capacitance with a 60-90 second cool down between uses.
- Medicae Servo-Skull should cost 1 capacitance, no cool down. In the chaos of it all, you decide to either use an ability or revive someone else.
- Purgator Servo-Skull should cost perhaps 2 capacitance with a cool down of 30 seconds, its not strong enough to justify any more or less.
- Integrated Refraction Emitter is a tricky one, cause it can be broken if it has a permanent up time, so it should have that cool down of 40-60 seconds, with a 2 capacitance cost.
It would also help the grenade economy - it honestly wont break the game. and would enable more builds to be online. Although it might make Redline Capacitance keystone more crucial, so that also might be another challenge that may need overcoming.
Its also thematic you know? the whole class identity revolves around Capacitance, so balancing around that might make everything a tad bit more interesting.