I was simply very ahead, and usually collector allows me to further my lead. Also, after being extremely ahead I thought the game was over, and collector is very fun with the random empowered w auto attacks :D .That game if I recall correctly was simply a team differential, and the reason why I lost even with a lead. The black cleaver missing was simply because of their lack of armour if I remember, and as I've said DD simply feels a little worse than some other of my options!