Electrocute vs Dark Harvest
Context. I know what each one does, plenty of discussions that say what they do but not why you take them. I know how their damage differs, and when it differs the most. What I am trying to wrap my brain around, is why some take one.... and not the other.
For instance, if Rengar would choose one... they would choose electrocute from what I am told. Early on it does more damage front loaded, so it makes getting early kills easier. Games usually are not completely over early game though, so being able to stack up dark harvest and use it multiple times in team fights sounds way more appealing (to me anyway).
So the ultimate question is, what about a champions kit makes you pick one over the other?
EDIT: Thank you for all the replies, it makes much more sense now.