Battlefield debuffs and "dispel magic" -type spells could be difficult to implement due to the spellcasting AI. However, those would be very welcome additions IMHO, if they could be made to work.
A couple of item-destruction spells (overland spells could probably be easiest to implement) would also give us some additional tricks to counter over-reliance on items. How about
:
Sundering (E3, F2, Alt 6)
Ritual, 40 Earth Gems
Has a chance of destroying each non-artifact magic item in the target province. MR negates, -4 to save. Very Powerful items, 2% chance. Greater items, 5% chance. Lesser items, 10% chance. Trinkets, 20% chance.
(Would be useful mostly against clam-hoarders, methinks.)
Send Stealing Magpie (N2, S1, Enc 3)
Ritual, 15 Nature Gems
Enchants a magpie with increased size and an ability to sense magical auras. The bird is then sent to a target province, where it will attempt to snatch a random magic item from the commander with the most powerful arsenal of equipment. MR negates, -6 to save. The bird has a 25% chance of bringing the item to the caster's laboratory.
Send Flock of Magpies (N4, S1, Enc 6)
Ritual, 90 Nature Gems
As "Send Stealing Magpie", but 8 snatch attempts, MR negates, -4 to save and a 10% chance per item of bringing the item to the caster's laboratory.
Tweaking would be mandatory, of course.
