Help with heartsteel build.

Hello everyone. So I'm a wild rift player who has migrated to pc. And I've really been enjoying ksante and sett.

I usually build stride breaker. steraks. Bloodmail. Ect.

But I really want to do the mathematically correct sett build. But I feel it's so weak in the early game compared to the normal build.

(I usually build heartsteel first into boots and titanic blood mail. And steraks)

Is this build supposed to be this weak early? Or is it just me building in the wrong order?