So I've been doing some brainstorming lately, and I think I have come up with a great squad composition involving Zaalbar. I dont have the resources to try this out so if anyone out there can try this, please provide feedback.
Start with a Embo lead with Boba fett, Dengar, and Zaalbar. For the fifth place there are a few possibilities, I think the best would be Qi'ra.
Embo's lead will allow the three bounty hunters to fall below 100% health multiple times, triggering zaalbars taunt and retribution. Big Z, Boba, and Dengar can cover the opposing team in DOT constantly refilling Big Z's protection as he regenerates his own health. Qi'ra will dispel enemy buffs allowing Embo to trigger his payout quickly. She also can trigger multiple assists with her special with dengar, plus adding 10% damage to their attack. All together this could create a devastating team. Some other possible characters to plug in would be Nest or V Chewie.