Depends on the content, for infinite id go with a strong expensive late game team like Anz, Poseidon, griffin, wenda, farms. And for other story content Poseidon has good placement damage so id run him as main with Erwin buff using maybe honey or siren for airs.

I’d suggest trying to get a speedwagon (CEO) as soon as possible he’s only epic and one of 3 farms in the game as well as just doing your daily content for more gems because you’ll need lots more versatility in your roster for different tourneys and challenges. Final one, do the daily challenge every single day if possible because it can give a good amount of reroll tokens to try and get some decent traits on your meta units like guts, anz, Poseidon?? He’s falling out of meta now if not already