How good is stamina sorcerer in endgame, dps etc? How big is the diffrence in dps betwen that class and other? Do people want stamina sorcerers in their party on vtrials?
It all depends on what you define as endgame. Progression groups ususally don't care what you are playing as long as you are good enough. It might be a bit harder to find a group with free melee spots.
In an actual topend score run? StamSorc is in the same boat as any other melee class - you are taking a spot of a StamNB and you don't even have a unique debuff like StamPlar.