I use concentration (Defence Attack+ and damage+ - good with high leach as well) and max resists mostly, I use a Up'ed and UM'ed Guardian Angel Hellforge Plate on my Realm Barb with a Concentration BeZerk (MAXED Concentration and Berserk) build cause +95 Resist all in Hell is so Cool when your Defense/Block vary with the attack type so much and Frenzy is no block so kind of the same except the defense drop.
You can get that in SP Easy
My Merc uses Prayer, (Replaced the might Merc as I like living better than killing faster and dieing but I do swap with him sometimes and he dies less (+15 Max Resist All=95% hell resists to all is UBER Runeword level and SP does not offer a lot of options like that)
Dwarf and Rising Sun or other sorb is good though higher the better, But if You use Nokozan Relic Ammy with the Guardian Angel Plate you will hit +25 resist all and if have the base bonused charms and equip to hit it = 100% resists in Hell.
Any source of Fade is nice no matter what the level is if you can find it.