Beornings can be a tank, dps or healer. As you level you’ll mostly use single target and bleeds. You have access to aoe attacks such as relentless maul or claw swipe. As you get more traitpoints you unlock damage boosts and utility skills.
Leveling is generally done in red. Blue and yellow provide survivabilty in either more tanky or (self)heals in yellow. In harder places (such as skirmishes, Deadly + or instances) these can be quite good to outlast the enemies. You’ll rely a lot more on bleeds and cooldown skills then.
Havn’t used yellow bear since the revamp. Would only use yellow leveling in a group setting with another heavy class such as brawler or champion.
Bees, heals and extra morale from blue is how i would build a yellow leveling bear. This is not an instance or well-educated build.