what the heck is off-healing? lol

Off-healing is something that elemental shamans and balance druids should be ready to do at any moment and no others. Ret pallies, feral druids and such should never be expected to heal, they don't have the mana for it, they don't have the spellpower for it and you'd be better off if they continue to dps in hopes of killing whatever it is before it's too late.

Of course if someone is screaming for you to off-heal, one thing you could do if you're not able to effectively off-heal is get far from the mob killing your tank then taunt it and run like hell. Gives the tank time to get cds back up and heals time to regen or others time to battle res, whatever the case might be.

Flexibility is win yet so many want to tunnel vision into things with a standard method and not adapt to the unexpected.

Beats me, but I am a team player; I tried really really hard and the tank died anyway lol

That'll teach them, i guess!

If you watch Tehseus's videos, he offheals spectacularly. Though that's more of a burst tactic in PvP and wouldn't be sustainable, so a little off-topic.

Ret also has sheath of light so they have a decent whack of spellpower at least.