And/or those little minievent things, such as spellblaze scar or blighted soil. Basically, when AM shield is active, it would null the effects of arcane 'pollution', either as a free effect or at a minor equilibrium cost (maybe have each tick blocking the field be equivalent to 5-10 damage or somethin'. Could also have varying costs based on intensity, but that'd be a bit fiddly.). This might include changing it so an active AM shield has a percentile chance to block lingering AoE status effects (such as banes, or the freeze component on ice storm, ferex. Damage would be dealt as per normal functioning).
Despite th'fact it would, indeed, strengthen AM shield (which probably isn't necessary

), I think it'd be a thematically (and mechanically, to a degree) neat change.