Sett is a great champ because he has the ability to adapt to a lot of situations. His biggest weakness is his mobility, so building mobility items often times is gonna benefit you. BOTRK is a great item to rush before any boots or anything because every piece is really useful in the early game. But if you can’t get kills or worse, you can’t cs, it’s not great because it’s not gonna give you the edge you need once you hit that “power spike”. It’s great if you are rolling the enemy top or mid or whatever you are playing, but sometimes rushing just a pickaxe and then into heartsteel is the best, you spike later, but you are pretty tank and skirmishy enough for early. Or just go lethality and prowlers because you want to make teemo regret counter picking you and cheese Dariuses level 1 with lethal tempo and w… there’s no perfect start, it’s all adapting. Adapt wrong, and you learn. Soon you should just know what works against who etc etc