Now warriors received yet another skill, Bloodrage... It seems that this skill have some similarities to spectral shield; I mean, if spectral will use a spells that deal damage to give you mana to spend on your own spells (probably healing) then this skill uses normal attacks that deal damage to regen your hp faster (or it gives mareg too?). Kind of prove that all skills have some sort of analog using the same principle.
If so then how about making a skill/spell that would work like wraithform but for spells? As far as i can understand wraithform forces mob to roll twice (or more) against players AC, and attack hits only if all rolls was successful. Saves works like AC but for spells, with one difference that high level players are failing save rarely. Then my suggestion - made it a skill/spell that forces a player to roll saves twice (or more) and if all saves are made, then player is unaffected by spell entirely instead of just taking half damage. Monks and probably Mages are most suitable classes to be given such skill/spell IMHO. In case of Monks it can be a skill like Empty Body, which will allow magical energies to pass through you, while in case of Mages some kind of auto-dispelling incoming spells (probably consuming normal dispel cost for each magical attack) would work.
OR we can make an analog for protect skill, making user redirect magical attacks thrown on protected person to user himself. (would be nice for necros, who got their spectral quite nerfed, even if it can be cast in combat now... such thing will increase usage of spectral in groups much more then just allowance of combat-casting)