Thinking about it, Wizards might be in the same boat as Sorcerers on this one ... but just in a shittier boat.
Wizards are going to have 502 and 519 as their CS spells, not counting 409 and 415. 519 is getting nerfed to the point where I would argue it is less effective than 719, assuming you're hunting a magical creature. I say this because you need to train in at least SOME fire lore to get 519 good even post-nerf, where 719 is awesome with 0 outside skills.
You need something to fill the cap between 502 and 519. Your options are 409 and 415. I don't think you should have 415 replace Immolate, it should be seen as an in-between spell. Which reminds me, I need to post about 409 on the officials.