I would recommend just mining Raven (RVN) using enemy1.09, steady profit and chance for upside given coin supply. Regardless of if you hold, also seems to be most profitable for several weeks (I watch closely - 150+ rig farm).
Agree ravencoin is worth a look and has potential. See here (ravencalc.xyz) for calculator since it is not easily found on whattomine. Could also have a look at pigeoncoin which uses similar algorithm but I think that one is a bit riskier. Both can be mined on suprnova.