lol u call it botRK, im like just buy a BK :P and yeah it was meant to replace madreds blood razors, not for adc, lol

I already love it on AD Yi- the Active with his free AD can be a good clutch nuke/ heal and the slow/speed boost is invaluable to sticking to targets.

Yeah, solid item on AD Yi...now if only AD Yi and Fiora were viable picks at a competitive level.

But it's true, this item and ghostblade are the two strongest melee adc items in the game.

I edited the main post to add a point.

Also, yes, indeed BotRK is arguable decent when you build no crit, as some bruisers sometimes do. EXACTLY MY POINT. But when you have 55% crit with the IE crit buff as well, ALL your autoattack damage items (and lifesteal) is increased in effectiveness by 1.55 * 1.25 = 1.9375. That is, ALL your other damage increasing stats becoming twice as strong due to crit. Letting the BotRK proc scale with crit doesn't make it better than the other items - it just lets it KEEP UP.

BotRK is good on bruisers. Primarily bruisers with less-than-great AD scalars.

See Shyvana.

I'm pretty sure BotRK was designed in such a way that it allows for a life steal option when you aren't scaling your damage with crit, from the Rioter posts I've seen on BotRK it was made with on-hit builds in mind. So basically all the champions that don't utalize critical strikes. Which is plenty of Bruisers as well as anyone who wants to go the on-hit rotue (Teemo, Kayle, Elise, Jax, Lulu, Irelia). The way BotRK works makes it more or less unreliant on AD scalers to grant you notable sustain, it just gives largely the same amount regardless of how many AD scalers you have so it reaches a point were it doesn't scale as well as other items fairly quickly.

Also, Infinity Edge is only core on AD carries that build critical strikes, and only the ranged ones. On melee ADCs or auto-attack based bruisers (Fiora, Yi, Tryndamere, Jax, Xin, Irelia, Nocturne, Olaf, etc.) you're better off going piecemeal crit more often than not by slowly building crit up with other useful stats (picking up things along the lines of Trinity Force, Youmuu's Ghostblade, and Atma's Impaler) rather than going full-glass cannon mode.

So no, BotRK isn't useless because it doesn't scale with crit. It just fills a different niche than what you desire using it for.

BotRK is not an ad carry item, ad carries don't build cutlass to begin with. It's for autoattacking bruiser champions with low (but existent) ad scalings and built-in attack speed steroids. It's very good on Nidalee (Q scales up to 3.0 with AD), Jax (Q and E scale), Tiger Udyr (Q scales 1.5 with AD), Nocturne (Q, R, and passive scale), Warwick (R scales 2.0, W gives huge attack speed).

The problem used to be that only ad carries could kill tanks at all. BotRK somewhat solves that by turning you into warwick, where you can kill any tank given enough time thanks to your sustain. It's not a burst item, it is an item for bruisers to duel tanks. If you are nidalee with teleport and you need to stop the 4k hp Shen from splitpushing, you get BotRK. That is an example of when you should buy it. The decision to not let it scale with crit indicates that ad carries should not build this item.