Please help my squad development, I went down the random line! Need to salvage my squad advice.

One last thing, I started upgrading my Tie Silencer and Geo soldier starships’ weapons to levels 2/3 since these ships will be part of my main fleet. I leveled up the Executrix to 2 stars. And reread your info on canteen and arena stores and starting spending on Tarkin, Chopper, Tano and others you had listed for me. I’m starting to make huge leaps in my progress, but still want to make sure I don’t misuse time and resources as I did before.