One important thing is to get a piece of equipment with decrepify or amplify damage (either charges or chance to cast) or you will find physical immunes in hell very hard. Other than that you will walk hell.
Reaper's Toll (with decrepify) for your Act 2 merc should do the trick
Don't throw rocks in my face, but personally, i wouldn't advise windy as a first druid... Needs a little experience in druids, and i'm an all-time werewolf-lover, so...
Werewolf is easy to build, and as far as you can get your hands on a decent 5fpa weapon(and there are quite a bunch), you can fend pretty well in hell...
*throws the first rock*
Werewolves need a good weapon and pretty good equipment(for max resists) to even survive in hell, let alone kill the monsters.
I have a windy in hell with almost full magic find gear still on. It doesn't need resists, it doesn't need life in particular, only thing it needs is +skills to a single tree and it can survive and kill possibly more effectively than most melee characters with similar gear choises.