Poor R5-K6 seems to be the least usd astromech at the moment.
But, with the Y-wing title in the most wanted pack on the way, imagine Dutch Vander, with the title, an ion turret and R5-K6
After movement select TL
Hand one TL to a friendly pilot
Attack with primary weapon, use TL
Throw die, if you roll well, get a new TL
Hand one TL to a second friendly pilot
Attack with secondary turret weapon, use TL
Throw die, if you roll well, get a new TL
Hand one TL to a third friendly pilot
Sure it won't work fully every time. But if you have a bit of luck you can toss around TL's to spare.
I am not mathwinger enough to do a decent calculation. But might we see a revivwl of R5-K6 in Rebel Y-wings?