Today is the first time I've been yelled at for not keeping a tank alive in his massive trains (Dohn Mheg).

The DPS lectured me that I should be spamming Holy instead of heals, and the tank accordingly blamed me for his deaths because of it. I know that wasn't it because the tank died in 2 globals and the packs lived far beyond 3 casts (diminishing returns).

So we either wiped because:
a) Cure II spam wasn't enough to keep the tank alive (and I mean literally button smashing)
b) I ran OOM before the packs died because (a)

Am I at fault here, or is this guy just not using cooldowns / pulling too much?