Does anyone know how to calculate the profitablity for the X11 algorithm coins?
I think you could say X11 is about 2.8 times faster than scrypt. So if we could work out the $/MHs/day at current prices for X11 and times it by 0.357 this should be equivalent to compare with scrypt coins.
Algo doesn't matter when calculating profitability. All that matters is HashRate, Block Reward, Diff and costs:
http://www.holynerdvana.com/2014/02/how-to-calculate-coins-per-day-for-any.html