Not sure if everyone is doing this but found a quite fast way of doing it.
Take the missions [DAILY] Anti-Toxin Acquisition, Go in kill everything, Do not click on item to activate the boss, Leave instance, Reset local phase Go back in & all mobs are respawned, Repeat till done :)
to reset local phase on an instance, leave, right click portrait, phase, reset local phase
Do not reset the quest or after reset you will have a cool down until you can reset again
Group Res & Healing Bonus enabled in both guilds now 😉
We now have Group Resuscitation so you can revive the entire ops group within 30 meters. Add it to your quickbar from Abilities->Guild. It works in all raid levels and PvP. Must be out of combat (Stealth classes FTW)