I got bored from this league after I had the tremendous luck to come to riches after sekhemas (22k div). I built a bm coea/coc comet character which allowed me to reach and win against everything the game has to offer. it was fun. but then... it became boring. like: super-boring.
I then decided to try the very same bm in SSF. And the entire game changed. Upto now, I reached T15 yesterday, the entire leveling process was tedious and ugly and difficult. Because I had to use what I found or was able to craft. But SSF forced me to find my ways through the passive skill tree and the games in another way. You have, what you have and adapt to your stuff. POE2 showed me again, why I love this game so stupidly much. You can adapt to every situation.
I am far, far, far away from a convenient, functioning BM. Right now, I don't even think about switching onto the crit-path. But my coea came up and is running now (snap).
What I want to say is: every day there is at least one post from a guy who spent stupidly much currency on a monster build he does not understand. SSF helps you to understand what's going on much better. You just can't skip.
There are "budget builds" that work really good in leveling. I liked my galvanic shards mercenery.