Well, my go-to build when I don’t know the team, don’t know how they play, is 1 Fire Breath 2 Leap Smash. Feeding Speed as the perk. I always try to sneak away at the beginning. And I try to limit myself to larger creatures. Mammoth Birds and Canyon Striders. I only ever eat smaller meats if I’m under a ceiling of some sort. Stay sneaky up until the first Carrion Bird sighting. Once you get birds, just start running.
Try to predict where they will be coming from and go in the opposite direction. If they split and send the Trapper one way, try to pinpoint him and go away from him. Even if you’re going to run into the others, they won’t be able to lock you down. Once you’ve made some distance and broken LOS. I like to start sneaking again, eating if you need more, and looking for a good spot to Evolve in. If they have Hank, Cabot, or Torvald you probably don’t want to do it outside.
At S2 I stack all three in Rock Throw. Now it’s time to get to work. Forget sneaking just go loud, eating and running, avoiding the Trapper, until you have full armor. Then look for a good spot for your first fight. Near some hostile wildlife or places that don’t give them lots of room to roach are ideal locations. Try to bait them towards you by scaring some birds. And hide around a corner or in a bush to see if you can get a pounce on of them. Any free damage is good damage but I prefer the Trapper or the Medic. Hank if they have him but you need to be able to adapt.
In combat you need to pick a target and focus them down. Try to break LOS from the Shield, the medic, whatever. My first target is usually the Trapper. If I can down them right then and there then the dome is down and I can disengage whenever I want. If they’re unavailable, switch to either the Support or the Medic. And through all of this you want to keep the Assault away from you. Turn and smack em away or use an ability on them to keep them off of you.
If you couldn’t down anyone just get out. Don’t overextend yourself trying to eek out that one strike. Probably not going to be worth all the extra health damage. And that is probably one of the biggest pieces of advice I can give. Don’t overreach - don’t be afraid to disengage if the fight isn’t going your way.
If you manage to accrue two strikes on the Trapper, you now essentially control the map, which is a huge advantage in your favor. One well-executed combo and he’s dead. No more dome for 2 minutes.
And don’t go S3 unless you need to. The ideal location of the relay usually gives the Hunters quite an advantage. Keep trying to bait out S2 engagements in good locations.
That’s my typical game as Goliath. Behemoth is pretty similar just with less emphasis on stealth
Edit: sorry for the wall of text but I feel it prudent to discuss overall strategy when discussing builds. Different builds work for different strategies.