Tagging as well!
..Also i have a R mandarin,what wingo said is spot on,well except mine eats brine shrimp and mysis. but he's with a coral beauty,rabbit,wrasse,stardust blenny,perc clown,black sebae clown,and a cherry and cleaner shrimp absolutely no problem and very little interaction between them and him.even during feeding time there's no issue i just feed the flakes and shrimp at the same time the blenny and him only compete along the floor for food and the blenny goes for the algae mostly and he goes for the shrimp.
But wingo is right,there's no sure bet the one you get will be willing to eat other things besides pods. ..oh and they're in a 55 going into a 90