Stun Limb and Paralysis are spells that are both great and terribly flawed. Paralysis is a hard-KO with immunity weaknesses that make it a poor bet when compared to Purify, or even just memorizing a lower level Destruction, Lesser Earth Storm, or Confine instead. Stun Limb is a very good spell in terms of reliability, but it’s a a soft-KO in that it doesn’t immediately take an enemy out of the fight. The loss of Web is more of a hurt to C Casters than to E Casters, as we have Silence at 5th (a niche effect, to be sure, but still a weapon), and Weakness at 3rd (a strong debuff). I think Stun Limb needs to be moved to 6th level. This would put it in competition with sleep, which is a hard-KO with immunity issues of its own. Paralysis is less likely to face a racial resist than Sleep, so this makes it slightly more powerful than sleep. Due to this, I would move Destruction to 6th level, Paralysis to 7th level. I would further convert Slow to a Curse and remove all Binding from E casters, to give C Casters more unique capability.