I don't understand how you will combine sha256 and scrypt encryption?
sha256 is for Asic miners and scrypt is for GPU miners. It isn't profitabile to mine sha256 with gpu.
I have a machine with ASICs, GPUs, and CPU. Will your service allow me to make the best use of all three simultaneously?
At the moment our mining software will automatically choose the most profitable currency (sha or scrypt) per machine. This means that if you combine GPU(s) and ASIC(s) in one rig, one of them would possibly mine sub-optimal currency for its kind.
You are still be able to manually set different currency for one of them (eg ASIC)
We do plan to enable automatic mining of different currencies in the same rig, but this is not among priorities at the moment. In the current plan it is a couple of months down the lane, sooner if there is enough interest.