Isn't there the problem where one pool having over 51% of the hashrate results in more orphans for other miners and pools?
My pool at
http://prospercoin.treasurequarry.com:37373 has just found its first block but it ended up orphaned. Not sure how worthwhile it'll be running a pool if one designated "official pool" continues to have the huge majority of the hashrate.
If that is correct, it ought to be near impossible to solo mine. But I have been solo mining Prospercoin with just one gpu and finding blocks as recent as yesterday ( February 3). I'll run a test right now. with a R9270X and 300 khash/s.