Not really, you could easily get resitances without trying hard on a barbarian. I went maxing my NR and had bout +65% just from that. On top of that you can use Nokazan relic and Hot SPurs for fire sorces, or go 1 handed and make a 160% Cold Res or 88% all Res SHield. WIth Arreats you can make a Umed one for 45 all Resitances, then Anya is another +30 Anni is 10-20, then use a few 20 life 5 all res sc's (5 should be good 25 res right there). Add that up and you get more then enough resitances.