Well my concern is to choose a school of magic from 4 available in Dark Omen that would suite Wood Elves most. Of course, Dark Omen has limitations and it will never be possible to make a Mod fully aligned with table-top version: Either troop stats or troops structure or something else will be out of line.
as with wh2edit we can create mixed magic by using magic items to generate spells ( as in the linked image )
may we can have magic spell more close to the rules book of the army ,
as i remember wood elves have some life spells to bost unit like give more svg+ or regenerate and some bad attack spell like very uneffective fireball
so for wood elves magic spell maybe a mix of orc magic with brigth magic ( orcs magic from magic object : like "ere we go" and " mork save us " ) and book magic from Bright Magic
it may worth a try