Which marksman build BotRK?

You generally shift into a crit build once you've completed the first or second item.

BORK CAN go on most ADCs(On some its core) but usually youd build BORK (first) if youre facing a tanky, oppressive team. If they're not then its not worth to build it unless its core.

Most of them use it well, since it offers a very well rounded stat line that's effective in most situations, although it's especially strong on anyone who focuses more on either raw attack speed (making the on-hit more powerful relative to their total DPS) e.g. , or those that have anything that can capitalize on the on-hit especially well (such as multi-hit effects) e.g. (Xayah too once she's out)

Currently it's just strong on any of them really, but those are some of the better ones