Aren't you sort of forgetting about: blindness, frozen, petrified, stunned and you can be dropped to the floor by a number of abilities or spells and there's probably more I'm forgetting about....those mean you cannot attack or do mucch of anything at all. In terms of damage even if burning isn't a great deal due to fire resistance, what are you going to do about bleeding?
In order: no I'm not; who cares?
In a four-person party, it's totally fine to have some characters with low or no saving throws. You're spread out enough where getting 1/4 of your party immobilized until you can produce a status cure isn't going to wreck you. The main exception to this are "buff receivers;" since you're going to spend AP casting Oath or Wildfire on those characters, it's worse than usual when they're statused, so they should have better saves than usual.
I've beaten the game on Hard (without any Lone Wolves) so I know what I'm doing in that department. I still have enough respect for how bad status effects can be on key characters (such as buff magnets) that I'm recommending high investment in Bodybuilding/Willpower for Lone Wolves; I figure both characters are key characters in a dual Wolf setup.
I really don't think Lone Wolf is worth it for this reason. It really should either give more ability points, or directly boost your saves so you don't need to invest as much. Probably the latter.
