I would say Qui-gon is your best bet, focus on your Jedi. Qui-gon, Anikan, Barris, Yoda for sure and then either lumi or ahsoka but down the line farm Aayla instead of lumi/Ahsoka I think
You've already got a decent team
And then if you have a really good jedi ally that would be helpful or maybe you could go with zyoda and use a zQui-gon ally but if you wanna use them in the arena definitely need zQui-gon yourself.
Zeta Jyn is also very good but since you don't have chaze not sure about that
zQGJ, Ahsoka, JKA, zBarriss and Yoda and borrow a Kenobi...will see you through all the light side nodes. You may have to gear them up a little more but you'll have a solid Jedi team.
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You've already got a decent team
And then if you have a really good jedi ally that would be helpful or maybe you could go with zyoda and use a zQui-gon ally but if you wanna use them in the arena definitely need zQui-gon yourself.
Zeta Jyn is also very good but since you don't have chaze not sure about that