The answer is easy - you got jtr as spare. P1 needs only about 10 - 20. If your guild got GMY teams (need approx. 5) you dont need any jtr to use in P1.
P2 is Sith time, Leia, Wampa, Phoenix...no jtr needed at all. Fun phase and basically never need to restart.
Chexmix is very often required to restart to get 5% and thats the reason you can use also jtr inside this phase. The damage of jtr is quite okay.
In P3 1 - 5 NS clean Nihilus, afterwards Sion has about 60% or less and you can use leftover jtrs here as well. But zKru/Phoenix will do just fine.
Solo Traya go with NS w/ acolyte x5 teams or alternatively send 10 - 100 times other teams (jtr can use, but will be disappointing damage vs ns)
Have fun!