Idea for new marksman item for on hit champs

Hey, i have come up with a unique passive to help ok hit champs scale with crit.

The idea is for another 'force multiplier' for on hit champs that dont want IE or essense reaver

Phantom repeater (or something) Recurve bow, cloak of agility, something expensive? X damage on hit, Y attack speed, 20% crit (alternatively, it could just have On hit damage and crit to be more similar to ER/IE)

Unique passive - Phantom hit: your critical hits will proc a bonus hit that deals no damage but applies on hit effects

Basically a crit scaling version of a sated devourer for the laning adc peasants.

This would give characters like vayne, twitch and kog'maw a bonus stat to scale from (crit) that synergizes with what makes them unique rather than just building items they dont really want. It could also lead to some different item diversity in general. Heck! it may even get kalista to start building crit

The idea came straight from a rioter talking about how he was interested in making crit affect different champs in different ways (sorry, i cant remember exactly who that was) and one example was having crit apply 2 stacks of vaynes truesilver bolts or varus's W. I just figured that rather than going through all the effort with changing all those characters kits, they could simply add an item in that works well with what they want

I havent listed stats, as i dont consider them important at this stage and would be balanced around the passive