Hi,
I have mandarin in my RSM 130 and he has been there for over a year.
In general I wouldn't recommend this unless you have the ability to provide the extra food required as technically a RSM is not big enough on it's own to contain enough live rock to sustain a sufficient pod population. Also you can't be sure a mandarin will eat any frozen or prepared food.
I did get rid of my flame angel too - in part becuase he was direct competition for pods.
We don't have a refugium or anything, but have set up a 'pod tank'. I'm from New Zealand and we can't buy them here so if you want extra you just have to breed them. Essentially all we did was get an old tank -can't remember the exact size but around 50 litres. We've added some coral rubble, a bit of live rock and sand, a power head, basic light and a heater. We just cycled this as normal (you don't need great quality water - I just used our water change water). After a couple of months you have a pod population. To collect the pods we just put some black coarse filter matrerial on the surface and shine a light over it and leave it for afew hours. You can then transfer the material (and the pods inside) to your main tank. They will head into your rock work - I would suggest doing this at night so your fish don't get them all!
We also hatched enriched baby brine shrimp directly into the tank (as they are most nutritious within 4 hours of hatching), although this did introduce extra nutrients.
After a couple of weeks -maybe a month or so we noticed he was also eating the brine shrimp we were feeding the sun corals. I'm guessing he made the link between the live baby brine shrimp and the frozen ones.
He now hangs out around the sun corals whenever they get fed and eats frozen brine and mysis (although he still totally ignores flake food). I've also heard you can train then onto white worms and blood worms - so I might try that in conjunction with the food he already eats.
Anyway good luck- they are a wonderful addition to a tank and well worth the extra effort!