Victory is based on the number of healer in the alliance.

[HyperSMB]

I mainly tank in PvP, i always do my best to grab heal first, as drk, i can stun, grap, silence and lower healing received, the last one i try to apply at first but the debuff is getting dispel very quickly... you can stun once but after that there is an imunity for an amount of time so no, you can't chain stun...

Chain stun was not the right term, I should have written chain CC, since you are absolutely right in that there is an immunity afterwards.