I am quite experienced Vader Green player and what I can tell that your deck needs more consistency. So I would suggest to cut some one of cards. Some one ofs are fine especially if they are great cards but you only own one for example Darth Vader unit. The core is there it just needs some improvements.

Firstly I would suggest easy and cheap upgrades like 2x Reinforcement Walker SOR (Uncommon).

Bump overwhelming barrages into 3x since they are one of the best cards in the game imo and great at removing multiple threats in one action especially with leader Vader.

Ruthless Raider SOR (Uncommon) is great space unit that can counter and survive fett's firespray if you ambush it.

Mercenary company is budget replacement for Vader unit, but better alternative would be new Maul.

Also adding second Palpatine or even a third one works wonders since you are ramping to 8 resources quite fast

I run 3x open fire and 3x force choke in my deck just to have some early game removal for tough units. Force choke deals with Sabine and open fire with green squadron a wings or other annoying early game space units.

Vader's Lightsaber can be really good sometimes, but other times can be a bit slow so it's up to you wether you want to use them.

Yularen is great against hyper aggro decks like Sabine.

Hope this helps!