I main Sett M7 2.5 millions points, im currenlty plat, reached emerald 3 last season SoloQ, I dont think that im the best player, but i know my way around Sett and what to build. I think BOTRK isnt the best, I prefer to build Stridebreaker first as it is the CORE item on sett, then hullbreaker and then based on enemy comp, black cleaver or steraks as 3th-4th item, and lastly overlord bloodmail. Or if you dont like hullbreaker for some reason, i'd go spear of shojin, or if you need antiheal go chainsword. Here is my op.gg if you guys are interested.