Hi there feline friend, 50-80 percent top 5 coins sounds good to me, you are covered. 10-25 percent ICOs seems to much risk for me but, like you say, whatever works for you. If it turns out to be a mistake in the future, you'll have no one but yourself to blame and learn from it, share your stories here.
The millionth of supply strategy will help you not to over invest, I know first world problem hehe. It's been very good for me. regards!