Benny,
I thought brass wire cuts give better cutting speeds than the Mo wire. I guess if you use pressurized deionized water in your nozzles then you'll get higher speeds. With my machine a fixed length of wire is wound on a cylinder which rolls forward and back until the wire becomes thin and then breaks. Then we wind another piece of wire on it. A roll of 2000 meters lasts almost a month my machines which normally run 12 hours a day. I think the spark current parameters for Mo wire machines won't be good for brass wire, otherwise I would have shared my machine's parameters with you. Normally average cutting current on my wires are 2 to 2.5 Amperes.
Zafar