Welcome to the forum!
As others have already said: Leveling with S&B is quite a dull experience…
My advice is to level up a Warlord. For leveling, you could e.g. follow malawiglenn’s “Beginner Spinner” build.
When you got some gear, you can switch to S&B playstyle.
The strongest S&B builds are currently retaliation builds, like these:
YUHU by sir_spanksalot
Retal Warlord by AlkamosHater
Caution: To make retaliation work, you need the gear for it. So these are rather “future prospects”.
If you want “classic” S&B, IMHO the “Carrot Lord by veretragna” still rules.
OFC you can play S&B with different classes, but Warlord is probably your best bet as a first character. Inherently strong, lots of good endgame builds. Perfect for a good start.