By basic gameplan against Blanka is to keep jumping in with the spash or d+forward, then do c. jab x 3, s. short xx strong Green Hand. Then repeat the process based on instinct and common sense. Also, I like to poke with only the c. jabs, df+forward, and s. forward. I also like to cross Blanka up when I get a groove going. For example, I’ll do splash, c. jab, crossup splash, crossup splash, c. jab x 3, s. short, sj. crossup splash, c. jab x 3, s. short xx strong Green Hand. Then, since he might be so frustrated as to jump, just wait a split second…if he does jump, LVL3 RS, if he doesn’t, use common sense on what to do next.
Another tip is to counter roll with N-groove after a blocked Blanka Ball, then break stock, and LVL3 FAB. The other alternative (stock already broken, CR, LVL3 FAB) is much riskier since competent Blanka players will FEAR a LVL3 RS already, and so they will not do a Blanka ball until his stock is over.