Re: Which Bear Build?
For PvM the most effective will be fireclaws with a 4 frame attack, crushing blow stack, and a point into shockwave for stunning.
You would basically put 1 point into werewolf, lycanthropy, feral rage, werebear, maul, fireclaws, shockwave, oak sage, then you will max fireclaws and then max as many synergies as possible. 1 point into grizzly bear might be helpful to distract mobs as well as bosses.
Basic gear setup would be jalals, duress armor, gore riders, + skill amulet, bul kathos and raven rings, arachnid belt (or an fhr belt with resistances), bloodfists, custom phase blade with 4x shaels and 2x resistance/ias jewels. Charms are shape skillers and life charms.
Fireclaws will do quite a bit of damage, but crushing blow and maul will still kill fire immunes. Shockwave and grizzly bear for crowd control. You may also charge maul and then use fireclaws to add additional stun to your attack against minibosses mainly.