Hey, if you're going Stirland, with peasants and all, you can still work it into that war priest/light magic combo you suggested.
Being on the border of Sylvania, it wouldn't be out of place to have witch hunters amongst the peasant mob. A light wizard is always a plus when fighting the undeads as is a war priest with a following of sigmarites (fanatics) (might not be as good as before, but fluff-wise, still an awesome option). Archers and/or hunters would also fit in nicely. And maybe some converted pistoliers ranging about the borders.
I am personally, building a Knights of Morr army based in the town of Siegfriedhof, near the border with Sylvania. It will have lots of knights and a few demigryffs, but mostly alot of peasants armed with scythes, pitchfork and torches, captained by a fanatical witch hunter. Can't wait to get my box of Empire militia to start converting my peasants.