Khan, dont forget about my thick skin ability; gun shots dont barely even affect Hepheastus, so I'm not worried about shooting myself, which I think I can probably stop from happening anyways. It's dealing with the back hand that worries me; I'm going to have to get creative.
EDIT: Is it possible for me to interrupt his interrupt?
Interrupting an interrupt is -really- dependant on timescale, ultimately something's got to give eventually, you can't just keep flawlessly evading or negating eachother's attacks. You've set yourself in motion to launch an attack, you're not expecting it to be blocked or deflected in some fashion, so reacting to that follow up is entirely dependant on if your character has a realistically long enough time to comprehend what's happening and then act.
For example, in mine and IN's recent fight, IN committed to a powerful falling attack that relied on me being basically stationary, understandably I moved, but my character only moved with a very short period of time remaining before impact, effectively cutting off reactions to the move until just before it would be too late. That is why the first interrupt is most likely to succeed, and after that its more likely for a hit to be taken.