Hello, just my opinion, don’t have to follow it, but I think you should really focus on your ships and start upgrading those more. Specially I would start with Hounds Tooth and the bounty hunter ships. That way you can build your way up to Executor. I would also recommend you use any Mk II guild tokens to farm Negotiator if you haven’t been already. You have some republic ships so it will at least be ok for a while until you’re fully ready for Executor. And if you have time upgrade your Jedi Knight Revan. He can really take you a long way on your roster.
As for zetas I would maybe hold it until you can get your bossk up and running with a bounty hunter team. That way you’re contributing towards Hounds Tooth as well.
Again just my opinion, you’re free to disagree or seek other advice if you’d like. Good luck on your farms!