Need feedback for magic resistance overhaul

I asked for some help in the General Discussion forum from people who *love* magic resistance, since they can help me catalogue all of the items that give it to the PC. But now I need feedback on the best way(s) to remove it from the game, and those people might not want to help.

So you modding afficianados, I seek your guidance and advice!

I have a very rough working mod to eliminate the probability-based magic resistance mechanic form the game. (Well, mostly eliminate it. There will still be a couple pockets of it.) My brain is turning to mush trying to com up with cool and balanced ideas for every item. Let me know what you think of these ideas, and help me fill in the "???"s below. Remember that some of these items give only ~5% MR, it's almost an afterthought, so the replacement bonuses don't need to be very big.

Here's what I've got so far:

Creatures: every creature with any magic resistance has its MR dropped to zero; in its place, they will get a +3 bonus to saves vs. Breath Weapon, Rod/Staff/Wand, and Petrify/Polymorph; a +6 bonus to saves vs. Spells; and a 40% resistance to pure magic damage. (Eventually I'll make this a tiered system, where creatures with low MR will get smaller bonuses and creatures with high MR will get bigger bonuses.)

Items:
Potion of Magic Protection = +5 bonus to save vs. Spells, and complete immunity to pure magic damage.

Cloak of Balduran = bonuses to all save increase from +1 to +2, and a +3 bonus to movement rate is added.

Robes of the Archmagi = ???

Enkidu's Armor = ???

Human Flesh Armor = ??? Immunity to Charm?

Silver Dragon Armor = 75% cold resistance and 40% electricity resistance.

Drow Elven Chain +3 = 25% resistance to all elemental damage (so drow wearing this have 65% resistance to pure magic damage).

Shield of the Lost = ???

Amulet of Power = complete immunity to pure magic damage.

Amulet of (5%) Magic Resistance = immunity to 1st-level spells (and a new name).

Kaligun's Amulet of Magic Resistance = immunity to 1st and 2nd level spells.

Amulet of the Seldarine = ??? (What would elves use in a protection item?)

Ring of Gaxx = ???

Carsomyr +5 = +6 bonus to saves vs. Spells.

Carsomyr +6 = +10 bonus to saves vs. Spells (you'll never fail a save vs. spells with this sword).

Purifier +4 = +6 bonus to saves vs. Death.

Purifier +5 = +10 bonus to saves vs. Death (you'll never fail a save vs. death... it contrasts with Carsomyr).

Hindo's Doom +3 = added +5 bonus to saves vs. Death.

Hindo's Doom +4 = +10 bonus to saves vs. Death (description says immunity to Death magic, this will catch any Death effects not covered by specific immunities, and any effects modded to use a save vs. Death).

Flail of Ages +5 = +3 bonus to saves vs. Petrification (fits well with its Free Action power).

Flame of the North +2 = ??? (Fire resistance? It's already so common! Maybe the opposite, cold resistance, since it's from the north. Or, how about physical damage resistance?)

Gram the Sword of Grief = Poison immunity?

Sword of Balduran = ??? (Something useful to an explorer...)