What creates agro?
There is no one single thing that gains aggro. High toughness can cause it, proximity can cause it, high dps can cause it, rezing people can cause it, dropping a bunch of conditions on a foe can cause it, some mobs react differently to different things.
http://wiki.guildwars2.com/wiki/Aggro
Some will state that toughness is the universal aggro gain statistic, not sure if that is true or not. Seen tanky builds get ignored for zerks or condi builds or medium/balanced builds.
(edited by killcannon.2576)
Like killcannon said, it’s a number of factors. When you add them all together, some builds generate really high aggro and other builds generate a much lower rate of aggro.
Case in point, I wanted to play a melee Thief that was quasi-tanky and didn’t rely on stealth. Also I wanted to try out the AoE buffing abilities of their Venomous Aura trait series. The final result was a melee S/P Thief that uses Knight gear and can pump out a ton of condition debuffs within a very short amount of time. Between my respectable dps out, high Toughness, high debuffing rate, and my melee proximity, that charcter has a real tendency to snag aggro and hold it. I kind of wanted this result, so I’m find with that. However I would have been really frustrated if I didn’t know in advance that this would likely happen.
Ranger pets usually, they are the pros…