We don't really know how much and how support really counts but we know that we can gain points through it.But what we know is the more people you assist and the more enemies you attack and deal enough dmg ( x%) the more points you will get.AoE is king because you can gain more kills and normally the overall dmg is higher than from single target abilities.The leader board will feature different things, most points, most points DK, ....So their could be a dmg leader/healing ranking maybe that's what you heart.The thing is everyone who isn't able to spend 80+ hours a week and completely focuses on PvP won't become Emperor.For us "normal" people the only chance to become Emperor is at the start of the game where maybe not as many people jump into PvP or to be extremly lucky and find a campaign without hardcore players.However I think and hope that there will be many campaigns which won't see an Emperor for months.