*Stare* The overall party loss of DPS would be greater if the BLM doesn't work a moment to push an OGCD. So, yes, deal with the shorter rotation for that instance and provide better overall party damage.

After a decade of "Refresh Please" There isn't going to be a valid excuse for a BLM to be selfish with their infinite MP pool. That goes for any player that needs MP - especially healers. If you've got the tools, you use them on request. Refusing off flimsy grounds is a good way of getting you kicked out of a static - which is about the only real situation in which MP is going to be a struggle anyways, methinks.