Alot of what cyrene says is rather good, in the case of evap is staying those upgrade paths would be good to reduce evap, but i still dont see it, ive mained magic so long that even when it was the main thing, the only reason i would switch off the magic is because i ran out of MP making it counter intuitive to "balance", and this was something that even without mana evap i still did.
oh and in the case of mana evap crystals, those require mp 30, 50, and 100s effectivly making them be really MP pot instansive just to save a small bit of MP
Load time is 1 second and 16 stamina for r1 ar, not 4-3, you also will lose your charges if you decide to cancel the skill, so I'm not sure what you mean. ( I'm assuming that you meant "can" instead of "cant", but if not, I guess you can sort of ignore this?)
Ice CC isn't really used all that much as far as I'm aware, icebolt is best reserved for fusions and CC ice doesn't allow you to do that(unless your friend has a ccfire wand or something). The main CC choice will always be firebolt, which is actually strong, does a decent amount of damage. I can't imagine a mage carrying a wand for cc ice because wm/mana shield exist which seem like far better options for dealing with crowd control. so I'm not sure why you brought it up. Unless you're doing cc fusions with a friend, but I'm not sure many people are utilizing that right now.
I've talked about switching earlier as well in this post outlining skills like blaze and mana shield being quite strong if you're able to switch wands. It kind of makes the existence of that magic staff kind of pointless as well since switching in menus is pretty easy with a bit of practice and the staff is what allows you to use all advanced magics without carrying different wands.
I'll save the rest of this poorly written shit for my own thread, but as always, I'm willing to debate anything I've said, so please feel free to respond to me directly.
Ice CC has crowed control use, its definintly not used but ya its a thing, and CC fusion sadly isnt a thing last i checked