ZQGJ, Zoda, GK are the core of the meta.
Missing one or a zeta severely reduces that.
Also since you're not dealing with Zetas, at your level it's rather irrelevant.
Honestly, you're better off giving up on Jedi for now and working on rebels. Rebels are extremely noob friendly, strong as fuck, and can hit top tier arena decently, and destroy a lot of comps. Jedi's are extremely weak without Zetas and GK.
Mid game it may not matter, but characters like aayla are good for stuns. Unfortunately stuns don't do much anymore with Triple cleanse so she's irrelevant imo.
ZQGJ, Zoda, GK, Ani, and R2 with both Zetas are imo the best all around Jedi team that can tackle nearly any scenario thrown at them.
IGD, Mace, Lumi, Bariss (unless Zetad), OB, Kit, Kanan are all pretty lame in general.
Aayla, IGD, Zariss, and Plo are situationally good.
It's a lot of work for a good Jedi team. A good Jedi team to me is solely for the end game players who have access to the materials to get them there.