I did this build becuase one i love renagr and he is very fun to play. This build has a lot of potential becuase of the crit DMG scaling with his Q and also since he is more of a dive in character he needs more HP and sustain, to be able to go in a stay in a get more than one. The sustain on the stride and deaths or slivermere also, the leathaliy and crit with the Quickblades, Essence and Edge of Night. I think this build would is good because of the extra health and armour, rengar is not only a threat with damage and crit but with the bruiser, tanky-ness of the items.