***** I disagree here, in most situations getting the kill is better than hoping your ally does, but when KiWiKiD is that isolated on the other side of the map, you could probably hold off. I'm actually willing to guess that Lust wasn't even going for the damage, and just wanted to heal.
Gordon Pown "When Nami's abilities hit allied champions they gain 40 (+ 10% AP) movement speed for 1.5 seconds." Lust wanted to make sure Turtle was going to get him quick.