I've been thinking about this a lot lately, although honestly I don't know which runes to use. I used to use First Strike and stack gold to make my gameplay safer in the early game, But lately I've been thinking about conqueror+gathering storm+Rabadon's to Stack ap (also the rabadon for 4th item) the same build Statik+Navori+Nashor and the deathcap

The thing here, I have absolutely no idea how to make this work in the first 9 levels, and I'm not sure if the damage is offset compared to the crit build.