Depends how aggressive you want to be with it but I would spilt it up into 5 bits then pick 2 coins from the top 25, another 2 from the top 25-200, and then one coin outside that for a pure gamble. That way you diversify and at the same time are in some solid coins too.
Cool strategy. I mostly invest in top altcoin in marketcap because i dont want to put my capital in high but after read your strategy i think i need customize my rule become like yours. Lets try.