On hit Varus
I can't believe nobody has ever tried this before but on hit varus is totally dope. He scales pretty hard with this and lategame you can 1v1 pretty much anybody and snipe from a distance.
First items you build are yoomus and manamune. Third item is always runaans because you won't have stacked out manamune to make rageblade worth it. Rageblade should be your 4th item because everything should finally be maxed out and you will just crush anyone with your on hit damage.
The final item besides greaves is very situational. You can build scimitar, maw , dominiks regards, or maybe even botrk. You can probably switch out yoomus for botrk but it's kind of eh.
I honestly feel like rageblade varus was such mistake. Varus is a tier 0 adcwith rageblade changes. I mean even you can insta blight somebody after 2 autos since rageblade applies blight. When you have those tanky volibears stacking hp and armor you can obliterate with on hit varus burst
stats speak for themselves.