Help needed for deciding on Omega and Zeta skills and general feedback on direction

They're both important. Your arena team will need all omega's to be truly good.
At the stage you're in zeta's will become a farfetched something. It'll take 2 months to gather 1, so don't think about them too much ftm.
Although, palps lead will be a gamechanger for your team, so you'll really need that one.