With most of my characters, I try to solo everything on /players8. Well, I've never done a bone necro. Immunities were never a problem for my summoner (Amplify Damage for the breakable physical immunities and skeletal mages for the unbreakable ones) or too insurmountable for my poison necro (Lower Resist, fire skills from the Trang-Oul's set, Life Tap and beating them up with Grief). So I'm apprehensive about taking a bone necro into Hell. Sure, magic-immune monsters aren't that common, but if I base my skill investment and my gear on getting good damage from my bone spells, there's not a lot left over for handling them.
I'm wondering if it's possible to have a gear setup that would let me kill magic-immune monsters with a weapon. Relying on AI curse shenanigans or on a merc doesn't appeal to me. I want to be able to, if necessary, walk up to monsters and hit them with a weapon until they die. I guess I want a bone necro that can act as a part-time meleemancer. Viable? Stupid? I have no idea.
Right now I'm considering Heart of the Oak with a Spirit shield, and then Beast and Stormshield on the switch (with enough dexterity to get max block on the Stormshield, but not on the Spirit). So I could hang back firing Bone Spears and, when I encountered some magic immunities, Life Tap them, turn into a bear, and eat them. I could get a reasonable attack speed and cap my cast rate with this setup. I wouldn't get much in the way of resists, so I'd have to carry a ton of charms, but whatever. I also wouldn't get as many +skills as I might like. Well, really I guess what I'd be doing is sacrificing the boots, gloves, and helm slots for gear that wouldn't be optimal for the bone spells, but that would let me have some melee capability. Worth it? Stupid?
Perhaps I'm overreacting over a tiny minority of the monsters I'll face?