I am sorry but I think that most of your altcoins are rather risky in terms of investment. SALT has an interesting project, discrict is quite awesome, waves truly has potential as a platform and burst is closely related to a specific casino which makes it potentially profitable. I am not so sure about your other coins. If you want to get profit long-term, the easiest and safest thing to do is to invest in top-10 coins in terms of their marketcap. Yes, some will leave the stage but most will remain on high positions with the prices going up. Just check out historical screenshots on coinmarketcap to see what I'm talking about.
As for my personal favourites, they are IOTA, Blackmoon and Electroneum.