i would do a small toadstool, some duncans, digitata, monticap, zoas, and acans. this will give you a good mix of soft, lps and sps and all are pretty easy to grow and take care of. none of which require insane lights either.
I love the euphyllias, but theyre sweepers can get really long, and the don't lose a battle very often. and with it only being a 10 gallon, that pretty well limits what else he can put in there.