Actually Warriors are a bit overpowered in the game... very high damage and health, high criticals and defense. It's kind of tough to explain how the game mechanics work, there is no Holy Trinity so a full on max defense/health tank warrior build is not advisable IMO. I'm not saying that's no good, but it will require a lot of skill/time (think Devil May Cry Dante fighting bosses). Same with glass cannons. Also you don't need a party to get the benefits from being in one, a lot of support skills are area of effect and some of them gives the player a boost in either damage, defense or healing, typical stuff I presume,but the if you apply it to other people (either in a party or strangers in the vicinity) the greater the effects. In this game players are rewarded for helping each other with buffs, experience, and gold. As for level 50 mobs killing max level players, it happens... a lot. The thing is the game down levels you depending on the map and area you are in, for example, your a lvl 80 Guardian entering a level 1 zone. You will be downleveled to 3 including your stats... BUT your level 80 exotic gear won't be dwnlvld, so you still get better stats than any player that's actually lvl 1 or lvl 3. Level 50-70 maps has a very thin population, except for maps with Dungeons in them. The biggest reasons are; people powerlevel inside said dungeons to 80, power level by crafting in Cities, and level 80's doing Fractals of the Mists to get their ascended pieces. The developers are trying redistribute better loot in non-dungeon areas and improve achievement rewards, etc. to repopulate this PvE mid level maps.