You saying that is bad advice seems like you are basing it off of someone with level 70+ gear. For the record, I always cleric for this and dps the hell out of the wall. For a new group with i50 gear, that is absolutely not the best choice.

Yes, he is a DPS check, but this is a negligible check that occurs way past bees phase. The reason for not straight out DPSing this boss as a healer is this: If your dps are new and not familiar with how to predodge the initial attacks, the heals need to exist to prevent them from dying when they are targeted by murder hole (which does considerably more damage to an i50). Long before we all rushed this fight with OP DPS, there was a time when you needed to fight well into the bee phase.

Also, casting Succor before the fight (immediately before) and during quiet phases with Stoneskin is not bad advice at all. Since galvanize takes the damage, you'll carry stoneskin longer through the battle. Maybe 10 seconds longer. But long enough to save some time and cast dots at the beginning.