GAC gameplan

If you could, try getting SK as he's good for offense, especially with his Omicron, which makes him great with a jedi tank & with Juhani's TW Omi. You could make a good team for both GAC, TW, & Conquest with Podiwan's Omi too. SK has 3 great teams (4 if you count the 5v5 & 3v3 GACs as different teams). You have some great potential if you work on a few other toons.

Don't sleep on Traya, Nihilus, & Sion as they can be pretty good as a backup team too. Especially since the Sith Trooper is already reliced for SLKR.

You have potential for good teams, especially if you have DCs or FDCs that synergize with the multiple teams you can form. I always try to have a DC that affects the basic abilities of my team. Any DC that says something like "When [Alignment/Faction] uses a Basic ability, then give them XYZ buff (or give debuffs to the targeted enemy)." Currently, for me, that's DS toons, because they're good for my SK teams, my all Sith Traya team, & my SLKR team too. I currently put Sith Trooper in with Traya until I get another Sith worthy enough of replacing him in my Traya team.

Look up some guides for what you can & should do. Look at everyone's Omis & see what they can do in GAC/TW/Conquest