For me there is no best Altcoins to invest because it depends on our timing, choice and luck. I know that it is all about security when it comes to investment so for me the more secure coins are listed on top ten coins in the market. But if you really want to invest in Altcoins try those coins that has bigger and stronger community and with active developers. I think your coins of choices are okay and I heard some positive feedback with those coins. Why not try ICO's? Make a research about a particular project you want so you can decide whether it's a go or not.