The damage they deal out is way too strong and completely unreasonable at least for T3, the tools they have at their disposal is outright ridiculous, not only can they drain your action points, making you unable to fight back, they do insane damage with their dots and M1, all whilst having the best kiting mechanic in the game and any damage you do happen to land on them is healed on the fly, it just does not make sense to allow one class to have all these tools available to them, especially in the lower tiers.
I can't comment on the Archmage dps potential in T3, as i have never had issues with them myself when running around on my chosen, so i feel it's most likely down to the kiting potential/dps output of the shaman that appears to unbalanced within the realms of reason.
No one wants to step back into T3 RVR lake once they see that level 30 shaman who has doubled potted, roaming around killing players in seconds without breaking a sweat, I've seen it kill the activity of the zone, i'd recommend scaling their dps for the lower tiers at the very least.
In the past i would normally just let it slide but its become too much of common thing to see these days, it's starting to look like every destro player has a shaman alt they jump on when they feel like just having a wee bit of fun, scoring some easy kills in T3
