It would seem to me that the best immediate option is to do the frontal 1/3 1st. You would be establishing a hairline and framing the face. Future procedures would jump of from there.
Its best to wait, like our other friends have said. You have made great improvements with the 1st transplant,your hair is looking good. Keep up the fight other ways, keep those grafts in reserve.
Surgeons and clinics that do offer FUT say that it is more efficient way to harvest grafts. Scar aside the donor area is left in a better position for future harvesting. There is also better survivability rates of grafts using FUT.