Hybrid for me is the best... No need to wait too long for the cooldowns. Also the combo goes like this : Bomb, 1 basic attack, Clave, 2 basic attacks and your target is dead. Follow Through combined with Master Warp Blade, Rending Clave and Assasin's Blade do the job. It requires skill but it's very simple and very effective.

A great variety of builds but I like how you focused on the Autoattack build, which is the most competitive. That fact and your layout is the reason I voted up on this guide. Unfortunately jungling is not viable since Zeratul is much more useful at roaming (killing solo heroes in lanes and denying their team exp) or helping to soak/harrass. Even with your build (which I like), Jungling may take Zeratul out of the lanes for too long and put pressure on your own teammates (who may be facing roaming enemies themselves). Still great ideas and good explanations.