There is not one, however your puller should not START to wait for the healer to be at 90% mana until they get to or below 35% mana. You really don't want to pull when the healer is that LoM anyway. Best suggestion is to do something to reduce the healing load on the healer, IE: enchanter or bard for mez and mana regen. Also, and damage mitigation you can buff the tank with or use on the tank would be a good plan.
Best of luck!