It seems to me, that it is totally impossible to win a game on U, even WITH savescumming. Its just not happening. The reason is, of course, a V. They present only a moderate threat when bunched up in open space, like Mortuary, "town" type levels are good too, but winning several "labyrinth" type levels, or normal "rooms" - nope, no can do.
How to fight this...hmm...
For example this : changing a minimum exp given for a kill to a fixed amount. Like, for easiest difficulty - no change. For next two difficulties - any monster gives a minimum of 1% of exp. And for the last two - 2% minimum exp per kill.