TK'd 236A and Airborne 236A work wonders in stalling Tsubaki. It slows their rushdown attempts, allowing you to set a stein or two. Doesn't always open up an opportunity for Mu but definitely puts a pause on Tsu.
I have heard for Tsubaki that some 6B's in combos do not work.
CH 2C > Dash 6B > Dash 6A > j.2C > Dash 2B > 6A > 6C > 214D Whiff > Dash 6A > 6B > 6A > j.C > j.2C (3.6K)
Above is a Anti-Air combo from Page 1; does that first 6B work on Tsubaki?