Noble Raptor, creator of the Kombat Akademy and NRS walkthrough guru has found a universal OS that can make any string in the game safe on block. Yes, any string, any character. He has two videos up with places this will be more useful with other people dropping examples in the comments.
In the video above, you can see it in action. Basically, you cancel out the ending frames of a string by hitting a button before and after the last hit. If they block, the string is canceled out and you just get a hit. If they don't, it just comes out normally. So yeah, that seems pretty good. You can test it out yourself and see what success you can have with it, but this seems to really help Scorpion and characters with stagger based pressure.
In the video above, you can see it in action. Basically, you cancel out the ending frames of a string by hitting a button before and after the last hit. If they block, the string is canceled out and you just get a hit. If they don't, it just comes out normally. So yeah, that seems pretty good. You can test it out yourself and see what success you can have with it, but this seems to really help Scorpion and characters with stagger based pressure.