Lately I'm taking a small shares (<1 ETH) in every promising ICO, hoping that at least one will become the next 'facebook'. Coins dies to quickly and are too unprotected against pumps and dumps. I know that much of the ICOs will be scam, but lately there are a lof of promising ones.
I am also following this strategy. I rather diversify too much instead of too little.
Concerning OPs investments i also think they were a good choice and I also hold small amounts of ETH, WAVES, XMR and STRAT. As mentioned before I am missing some cheaper high risk/high reward coins in this list like for example Espers (don't buy on Yobit!).