Balsam Salabunde and the spell to get rid of poison.
(Look here
http://www.rpgwatch.com/forums/showthread.php?t=12389 at my list of translated spells)
You imho should also have a quite high value in … what is it called ? "fastness of body" ?
And then there's that physical ability of what is called "Selbstbeherrschung" in German. I don't remember how it is called in English. It prevents you from having too much wounds, if the value is high enough.
And don't forget profane wound- and poison-healing abilities, too !