This is solved simply. Would the loss in your DPS be made up for by the gains from the other raid members due to replenishment? Would the healers have received enough benefit, and the other mana using classes received enough benefit to outweigh your DPS loss. If the answer is yes (and it almost always is), then you tooting your horn about you'll suffer a DPS loss is irrelevant. a 200 DPS loss to you is a worthwhile trade if it keeps the healers and other DPS from going OOM so they can all DPS longer and keep people standing longer.