conviction lowers enemy defense and enemy cold/fire/lite resistances. it lowers their defense so it lowers physical immunity, but it doesn't lower it much. tornado is magic damage, where hurricane would actually get a noticeable difference, it being cold damage. some dex is better than no dex. 75% and 70% have little difference noticeably. if you are really stingy, go for 75%, but i usually go for 50% or so block and max life. with a stormshield, block shouldn't be to hard to attain. a bear is a good tank vs melee, and a little known fact, if you are teleporting with a bear, you are untargetable after each teleport for about a second, and the bear is the only real target. use wolves when they have to aim for you, mainly a caster. a foh paladin or even firebolt sorceress might just hit the wolves rather than yourself. bear vs. meleers, and wolves vs. casters i would say.