Do 2c 5c j.a j.b. If your 2c hits it's a combo if it doesn't you can't jump and will reverse beat into 5a 5b, after which reverse beat into 2a to make it safer.
Edit: Slight afterthought, don't recklessly mash the IOH because it's really unsafe on block, and even more so if shielded. Learn to cancel it into EX laser or use it only when you have CS.