Traya triumvirate + emo (fallen bastila) + SiT is your team until you get DR and Malak and need these last 2 chars.
It will win against everything up to JKR, even with a low gear SiT (first time i used him he was 4* g7, and it was good enough)
If you want to beat jkr you'll need an explicit build, of tenacity, crit avoidance, and protection (speed can be ignored) and with thrawn instead of SiT.
But tbh, maybe it's best to avoid this parh as you'll be restricted to the kind of JKRs you can take in TW, to the ones that hit less hard, by her number of stars and automatically lack of G12.