My squad with potency/speed/g# is
Teebo(l) 75% / 157 / g10
QGJ 92% / 160 / g10
Chewie 66% / 106 / g9
Phasma 53% / 173 / g10
Ewok elder NA / 155 / g10
At 75%, teebo is reliable in all phases of T6, but does seem to have more misses in P4. and qgj at 92% is probably overkill. That squad has done hits of
T6 P1-P2. 8.6mm (solo p1, 1/3 p2)
T6 P3 4mm
T6 P4 3mm
T7 P1-P2 2mm+ (solod P1 and escaped toons to save for P4 hit)
On T7, i only have hit for teebo on P1 and he was plenty reliable for that and was looking fairly reliable into P2 while i was trying to escape toons.
Having other toons that can do tmr on basic (qgj,chewie) to backup teebo or give him tm advance to speed him up when he misses (phas,ee), or inflict slow (phas) can make a tremendous difference. Ee is also nice to have since he can heal,rez and cleanse debuffs including the pig capn deathmark. I am currently farming dengar for his tenacity down to make my squad more viable in P4.