No good telling from right now, because it all depends on whether an altcoin goes up in value or not.
As Slow Death said, the minimum withdrawal is sky high and if you do make your ROI back it will be some years before you can actually withdraw anything. Plus, since all contracts are 1 year now, you're probably not going to get ROI in the first place.
Do not forget how they increased minimum withdrawal and decreased length of mining a few months ago.
It means that they do not care about their customers, and is a cloud mining site to avoid at all costs. Choosing the algo to mine is only going to prevent you from losing more money.