It takes about 2 days for me to mine 1 ETN on http://pool.electroneum.space, so that is what I use for comparison. I try to test two pools at the same time, so it won't take too many days to reach minimum withdrawal threshold on each pool. It doesn't make sense to use more than 1 core for each pool unless the pool has fix for the difficulty adjustment bug. For most pools using the default configuration, the difficulty increases after few shares so much that the Stratum proxy thinks difficulty must drop below minimum level and can't recover without restart. This affects mostly machines that are on middle of the difficulty range for specific Stratum proxy port configuration.