Chill Touch is a 1st level Wizard spell that's extremely effective for crowd controlling undead. Command Undead is a 2nd level Wizard spell that does the same thing that your Enchantments do to other creatures. Glitterdust can blind undead and constructs, Web can snare them up. The spell Blinding Breath is a Reflex save-or-blind, which also works on undead and constructs, use the spell Dragon Breath or the feat Draconic Breath to use it, or even get Improved Familiar for a Hellhound or Dragon Familiar and use it with Share Spells. Ray of Flame can end up causing a lot of damage to an undead since if caught on fire they won't try to extinguish it and will continue taking damage. Ray of Ice is a decent low level, single target damage/snare spell for when Web would do more harm than good.