Have been considering going for #1 or as close to as possible on the leaderboards.
The main thing i would have to do to prepare for such a feat is to print out all of the maps and label very specific paths and shooting points/angles/minimum bullets required for a fight to account for backtracking to heath/ammo rooms, treasure would be noted on paths.
Also, It would be necessary to take special note of which gold and silver doors could be opened and then subsequently blocked by dead bodies of fallen guards.
Really with a good map path book and some free time, this shouldn't be THAT difficult of a task. Just gotta no-life it.
What do you guys think?
Edit, a few maps namely aardwolf maze and a few secret levels might give me some trouble in terms of completion % will have to make special plans for those.