Do mages and tanks really need buff?

[Dex Scene]

Firebals stun in pvp dont works that great against tanks not even 1 sec that they are stunned.
Rouges have stun imunity wich makes them able to kil a mage befor he can stun the rouges.

A pack of shielded mages are deadly :P
Rogues' stun immunity comes from Razor shield which last 4 sec ish time.
Anyway my point is, Rogue is 1-1 class. Going for 1-1 against rogue with a mage might not show the real side of mages. Mages are great in clash. Fireball, shields are very good.
Iam not saying mages don't need buff. A stun immunity skill and a armor buff is needed...
but the shield doesn't need a buff nor the damage. They are great already.