I am trying to determine the GPU mining profitability for the next few months, Ill probably be using a coin switching pool with about 15-20MHs. As of today coinwarz has TAG coin the most profitable, at about .0285/day per MHs (Doge at .0151/day per MH). I understand the volatile variables that come into play when choosing the most profitable alt coin to mine (price,diff level etc), but how can you estimate what 1MH/s can mine per day say 2 months from now?

If these coin switching pools are always switching to the most profitable coin, and new coins are always being released, what could be the biggest hit to the value of 1MHs of GPU mining power in the near future? I know the most obvious answer's when scrypt asics come out, but Alpha T still looks like its months away.