Well there is some items out there that can help you against the level drain, what can be a real pain in the butt. If you take the shawdow theives route there is a amulet that you get that will help against the Vamps. And you can always cast Negative plane protection a 4th level spell.
Give a list of your charcters(all of them)and there level then more help can be on the way.
There is always cheat ways to get around the dragon. But some people do not cheat.
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