Continuously roll at your opponent with both the straight roll (Charge 2 seconds back then punch) and somersault roll(Charge 2 seconds back then kick)

As long as you are always charging back and attacking you will dominate your opponent.

Also look for opportunities to shock your opponent, anticipate when they are going to jump towards you.

For fighters that shoot projectiles, you should hardly get hit by them with Blanka since he can duck underneath all of them with holding down and all three punch buttons. His amazon punch slides under projectiles as well and gives you an opportunity to get a hit(crouch towards opponent then Heavy Punch)