i played around with Big Band a bit and found that Beat Extend after the launcher will set you up to catch them via A Train immediately after. since both are blockbusters, beefy as heck damage strung together. this could maybe also lead into SSJ but i haven't tested it
Disclaimer: can't confirm this works on everyone, though Cerebella & Eliza are a yes; can't confirm this works in the corner, though mid-screen yes