Depends on the mountain. I can see only two ways (other than with magic, which pretty much renders the issue moot) where the epic party will fare better:
1) Climb skill. To some extent one person with climb skill can traverse problems and use a rope to get others past it--but note that again...
I'd definitely leave off the sexual aspects--what PC is not going to realize something is up when someone comes on to them? The only way to pull off anything remotely sexual is if the characters already seek out feminine companionship in town. In that case the succubus could put herself in a...
There's also the old standby, the Molotov cocktail. Tanks are vulnerable if you can get close enough.
That's how I feel about it, also. The only way to actually protect yourself is damage reduction.
Lets look at the threat of those 10,000. A natural 20 won't hit, what do we do?
That means they can't hit? That doesn't feel right, enough stuff coming at you and something's going to get very lucky.
A natural 20 hits anyway? Insta-killed. (I'm picturing an army with ranged weapons.) I...
My approach is that you need to list what you are carrying in food & water in your equipment--realistically only for encumbrance purposes. I note what people are carrying but ignore it unless they are in a situation where there is no resupply to be had for a period longer than what they are...
I would roll d10+50 to get the percentage. A lucky roll gives you 12 levels, otherwise 10 or 11. I would then build them up, at each level pick randomly from the classes they are currently eligible for. Also pick randomly from the skills and feats the original had.
If you end up in a dead...