Firstly, congrats sir! Well, well done. What's the total elapsed time on your DoomRL file, if you don't mind me asking?
I think this raises a couple of interesting points. Number one, should Marksman Diamond be revised? The strategy clearly doesn't revolve around pistols at all. Tormuse basically said it wasn't any different from Demonic Diamond, perhaps even slightly easier. Does this really impart the spirit of AoM?
Number two, perhaps Berserker and Vampyre should be revised. I like the idea behind them, and I think they're fair in theory--certainly in a AoB run. But when you also have the ability to destroy enemies from a distance in a hybrid build, it does tend to make the game a bit easy...My HNTR Vampyre build was certainly the easiest run I ever did.
Moreover, the fact that it turns Pain Elementals into roving berserk/health stations certainly is a bit much. On the other hand, could argue that this is the possibility you always have in Nightmare!, ala the way Tormuse saved himself earlier. Perhaps we should move discussion to another thread?
But most important, CONGRATS dude.