Droid Caller Dilemma

Hey guys

I'm stuck between giving my droid caller to either QGJ, one droid caller away from gear level 9. Or giving it to Teebo (Gear 9). I'm 30 mk 5 thermal detonator away and a droid caller away from leveling him up to gear 10.

Both toons are 7 star level 80, but given the importance of reducing TM in rancor raids, I'm wondering if I should invest it these two toons or perhaps giving it to other heroes like RG or Poggle (both one droid caller away from 9)

I appreciate any assistance!