Sorry if this has been discussed and clarified already - I didn't see anything obvious after a quick search.
So I'm not clear on how the effective level of the turn undead spells under the Restoration school of magic works. The info on UESP says dual casting doesn't increase the effective level but surely this is talking about enchantments or something, but not spells?
http://www.uesp.net/wiki/Skyrim:Turn_Undead_%28effect%29
Unless you can dual cast and increase the effective level, the listed levels are so low that they are practically useless! The Necromage perk only increases the effective level by 25% but you need a restoration skill of 70 to qualify. That's pretty high unless you grind. My illusionist is only at level 32 or 33 so the undead are already beyond most of the spells; that can't be right. What am I missing?
* Turn Lesser Undead - up to level 6
* Repel Lesser Undead - up to level 8 (really? just a two-level bump?!)
* Turn undead - up to level 13
* Circle of protection - level 20
* Repel undead - level 16 (same level spell as Circle of Protection at Expert, but only effective against weaker undead? huh?)
* Turn Greate undead - level 21 (way more expensive than circle of protection and only gets you *one* more level?)
* Bane of the undead (level 30 and a Master spell!)
* Guardian Circel (level 35 and a Master spell)