My Mii Brawler set for SSBU is 1321.
For B (Or Special Move), I use the Shot Put. It really isn't useful when using on enemies regularly, but in a situation when the enemy attempts a recovery from the bottom blast zone, you can time your throw and aim right so the shot put shoots off the edge, possibly hitting the enemy which stops their recovery from working.
For Side-B, I use Onslaught as it is superior over other Side-Bs as when the opponent is at 100% or more damage, you can finish with the Onslaught, launching the enemy into the air which blasts them 2/3's of the time depending on the eney's damage.
For Up-B (Or Recovery), I use the Upthrust as it can recover higher than other Up-B's, and can be an ok move to use against your enemy. If an enemy attempts to make sure that you can't recover after getting thrown off the stage, you can Upthrust, dealing damage, cancelling the enemy's attack, and recovering from falling off the stage.
Lastly, For Down-B, I use the Head On Assault. This is a move the sizes up to other Down-Bs, and is relatively is a good move. If you throw your enemy off the stage, and you want to attack making sure the can't use their Up-B, you can use this and dig them down into the blast zone. This is risky though, as if you miss, you will go diagonally into the Bottom Blast Zone, surely killing you unless your enemy somehow saves you by hitting you in air, causing you to be able to use an Up-B.