The problem we are talking about is not comparable with or btc ltc. You talk about profitability.
I would like to avoid the mining of PTS is profitable only 3 days every 50 days. I prefer an average return for 55 days and requires miners stayed on the pts to benefit throughout the period. Currently in 3 days I won more than 50 days preceding.
Unfortunately, I think that the problem of regular minors is not yours.
Now I will do as the other miners, I will come only when the difficulty is low

PS : sorry for my poor English.