You can get better that that tho.
B123 DASH 33 DASH 134 BF2/4 - BF2 = 35.1% // BF4 = 32.5%
Just remember that BF2 switches sides, but if you AMP it, with the above combo, you'll get 37.1%
If you want easy and consistent, replace the DASH 33 for F4 and there's no dashes needed. It nets less damage but way easier.
In the corner you can do 3 3 134 into either DB2 or BF2 AMP.
If you looking for combos, check here:
https://www.kombatakademy.com/mortal-kombat-11/sonya/sonya-ring-master-advanced-combos/ - It's a site by Noble Raptor and it's an amazing source of information for MK11. I can't stress enough how valuable that site is.