I ask myself, why would you need CHolo? To get ROLO, of course. Why do you need ROLO? So you can earn additional TB credits that you can use to buy gear and Hermie/Wampa. Is all that effort to get CHolo and ROLO worth it? Maybe. Any other advantages? Unknown.
Personally I think JTR is a flash in the pan, I think she just hasn't been figured out quite yet. It's possible that the counters already exist for her ... it could be that classic Phasma FO is already a match for her. It was a close match, but I dispatched a JTR squad with my old de-modded FO in the last TW, much to my surprise. She is good though, but you have to get both the Vets; that will take a while, and I don't see anyone using the Vets for anything other than unlocking JTR.
NS are fun and strong but easily countered in my opinion. I want to gear them too. But people are dropping Acolyte from NS teams left and right to make them more resilient to their counters. You may regret farming her.
After mod farming for the last three months, I am stopping the speed hunt to get UKR and his ship, if that is any help to you.