I would only add pods
or live brine if they dont eat at first. If you add them occassionally you might trigger them to revert back to live food, which would be bad especially if you have two of them.
Personally, I wouldn't do two and I have been known to try some "difficult" fish. lol It just seems like you are setting yourself up for failure. Something I have learned over the years keeping saltwater is to not press your luck. I had a mandarin for a few years but am not considering getting another one as i feel I had my luck no need to push it. lol