I actually feel both characters wanna whiff punish each other more than they want to be poking at each other. Balrog wins that war until Necalli is in v-trigger IMO.
Use poke tools (cr.mk, st.hp) to check walk forwards and bait attempted whiff punishes from Necalli (like his st.mk, st.rh, cr.mp, cr.mk, st.hp)
Then whiff punish with cr.mp or st.mk buffered into dash punches.
Also know your punishes through some of Necalli’s offense, like v-skill through blockstrings that end in stomp since it’s considered a projectile.
Good Necalli’s will use divekick to throw off your anti-airs, be alert so you don’t get stuffed.
Also don’t press buttons after a close quarters seismo by Necalli, you’ll only end up taking a CC rh, better to step back and reset neutral after blocking, or v-reversal to guarantee a KD and pressure.
All I can think of atm about this MU.