Make dark harvest viable again

The issue isn't with the rune itself, its with electrocute being better unless the game goes on for a really long time and/or you are snowballing a lot and/or you are karthus.

Electrocute simply does more damage early game (not straight up, but in terms of cooldown unless you reset from a kill on enemy jungler gank), mid game, and in many cases late game too unless it gets to be 35 min+.

Electrocute should be an early game rune losing power as the match goes on, but it keeps scaling really well. 3 item zed does like 400-500 damage just from electrocute proc after laning phase ends and skirmishes/jungle picks start occurring.

If they reduce the AD/AP scaling dark harvest could actually compete as a rune that is meant to be more impactful later on. Another idea is, if electrocute does adaptive damage based on your primary stat AD or AP, dark harvest can instead be made to do whichever type of damage would deal more damage to the enemy factoring in resistances. So on high armor targets it would do magic damage and high mr targets physical damage.

Electrocute is simply more reliable and does more damage for way too long until dark harvest can compete.

It is true though, not needing 3 hits to proc it makes for much easier picks on low health enemies or with abilities like Jinx R, ezreal R, lux R etc.

Still hardly ever see it.