For me it’s basically this :
Great Weapon Master Sentinel Sharpshooter Alert Mobile Lucky
Left and right feats mostly.
Everyone point at this loser who didn’t tadpole their way to flying.
Alert.
It’s broken. The initiative die in BG3 is a d4, which makes the bonus from alert game-breakingly good.
Yeah, i always take it for Gale ! It’s broken
Mostly just ASI, but I also get a lot of use from tavern brawler and sharpshooter. Trying a thing with spell sniper in my current run.
Polearm master is good for certain characters I feel.
Karlach zerker with polearm master and sentinel with the act 2 polearm is a beast of a character. She’ll lock down anything that comes close.
The ones you listed plus Tough and War Caster
Mage slayer mobile and alert.
I pretty much always put durable on everyone
