I work similarly to you, going for safe consistent small gains. I would advise you to trade on top 30 though, there are plenty of chances for massive gains. Look at ontology, or Verge. I was riding both those trains up and then jumped over to EOS and ICX which i'm on right now.
Anything in the top 30 is a fairly safe bet, and if you trade with "buy the rumor sell the news" you can end up pretty godamn green.
In the end of the day I don't really care one bit for 99% of the altcoins. I just wana get more BTC.
I had some good gains from Verge too until they announced the pornhub partnership, I don't touch Verge since then, waiting until markets will make mind about it again.
To trade 30 coins would be great, but I'm afraid that I will not have time to analyze all the coins daily.
It would be great to have something automatic or semi-automatic to make analyzes faster or even trade.