Which class is better overall?
Which class levels quicker?
Which class is better for bosses?
Which class survives longest?
Overall with all ranger
All classes lvl the same with the right build/gear but to solo lvl ranger/warrior/rogue
For bosses dps classes ranger/rogue only a few tanks are need it and the kill will always go to dps group.
Survival really comes of how fast you kill , i have see ranger/mages/druids solo a boss with out dying and because this classes can regen theirselfs at faster rate and / or stunt, slow down their enemies , + they are long distance damage means less damage taken you can survive longest .
Must ppl mistake warriors as the longest survival but to survive you have to kill the mob and must cases the warrior will be near death by the time he kills especially as hybryd/damage warrior.