hey Ghost have you tried Bald Guyz shave gel? I would give it a try. It works really well with Mach 3 for me.
From my experience (and that's from a guy who struggles shaving) you will find it impossible to cut yourself.
As for headblade, I have never tried it but here is what I did. I used some bald guyz pre-shave scrub before shaving, rinsed out, and then applied bald guyz shave gel, shaved using Mach 3 and man it got me a really smooth shave. I don't know if headblade would have done such great thing for me.