I try not to post alot of things that work well but i need to stop doing that.
1. End blockstrings with a 5hs frc ( not all the time and mix it up) Ex: oki: 5p,2s, [this is where people will think its safe and attack since ur close up] 5hs frc [this will beat out anything, ive yet to see something beat it out or when ur frc it and see a super animation from them, u should be able to fd.]. Once the 5hs frc hits, run for 1 sec or so (to waste time for tension regain of the frc if u didnt know) then do whatever combo ur tension allows. I mainly go for knee rocket frc then SJ combo. If done at 75% tension, you can land three lvl 2 rockets on them in the corner which this really fking hurts.
2. This doesnt work all the time but it can catch people off gaurd. When you have 100% tension, as an oki do 5P/2S, 5hs frc [x4]. this will buil d there gaurd gauge to flashing to where u can fish for a counterhit or throw counter.
those are some tricks u can do.