I'm not actually sure this is possible. I think the +10 stats w/ no deaths is a global variable based on your death counter. It's either in effect or it isn't. I don't *think* you can base it off of what map you are in. I also don't think there's a way to preserve the death count for any character at 0 (aside from plain not dying).
Yes, there is a global variable for EVERY character that keeps track of how many times you've died (I'd love it if that information were made available to players via NPC, btw, I think it would be entertaining). The SN link has a chance to reset it (iirc), but I don't think there's a feasible way to "freeze" that variable (could be wrong).
