I only change their clothes when they are on their third skill set before becoming an Elder, and again when they become an Elder. That way I know where they really need to be and, since I let Elders do whatever they want, when to leave them alone. I do put Healers in white so I can find them easier. I have all 50 totems but I still change clothes to Elder costumes when they reach their third Master level just to remember to leave them alone. I change clothes once a day when I first open the game, then I just let them go.