Jan 7th 2011 5:13PM At least in my groups Diamond is also being used for Warlock Fear (now that they don't run around if you glyph it)
Jan 7th 2011 5:11PM Xot, as someone who has played healers on and off since vanilla (when similar stuff happened) I would say your option is basically to blackmail the group into doing it.
If they won't CC tell them not to blame you when they die, as they were the ones who chose not to prevent the damage that killed them.
And if they wont let you drink, sit down and drink anyways, make a macro letting them know that if they pull while you're drinking that you're not going to heal them. And the most important part of that, is don't bluff, you must mean it.
If they pull and you're drinking, sit there and continue drinking until you are at full mana, then and only then (and if they don't look like they're going to wipe anyways) start healing. If they complain you can always use the "it's just more mana efficient to rez you" quip.