Hmm, maybe I should spell out just how awful Disruption Shield is. Disruption Shield is among the most ludicrously broken talents in the game. It gives you an incredibly amount of EHP and resource restoration. However, the shield only works if you have very low mana. Therefore, to use Disruption Shield properly, you have to spam spells at nothing after every fight in order to lower your mana enough to have it be useful. The other problem you run into is that you want to get rid of mana as fast as possible, so having high fatigue is actually beneficial instead of the drawback it should be. Disruption Shield simultaneously trivializes defense, resource management and choosing between light/heavy armour while being incredibly tedious to use.
The simplest method to fix this would be to make a custom tree which is basically just Spell/Arcane except with Disruption Shield being replaced with Mana Shield. Mana Shield just converts x% of all damage you take into mana damage. Optionally, have this mana damage be modified by fatigue to encourage light armour. Of course, all this assumes that Illusionist needs more durability, which I'm not sure about.
Meta could maybe also stand to be axed since it's really strong and only dubiously thematic. Plus the class has three locked class categories already. Not as big a deal as other stuff though.
A lot of your talents use linear talent level scaling, which is incredibly bad practice. Move them over to the proper
scaling functions so they use diminishing returns like every other talent.
As for images checking mental save, there are a few good reasons for that. First, the flavour justification for high-WIL and low-CUN creatures not being able to see through illusions is dubious at best. A cunning creature might spot discrepencies in the illusion, but a high willpower creature might be able to disbelieve the illusion straight-up instead. The second reason is for consistency: All other effects like this use a power/stat against a save. Saves and powers are subject to rescaling, which leads to less absolute results. If the flavour makes for inconsistent mechanics, then rework the flavour.
Shadow Cast's description is kind of ambiguous in that I didn't realize it was a beam until I fired it.
Shadow Bind having a special case for a single type of enemy is bad. The flavour is solid, but that is no excuse for bad mechanics. The ability is probably complicated enough without converting enemies anyways.
I really don't like how Create Image works. It has a random chance to spawn a different type of creature based on talent level. The differences between these creatures are not given in the talent description and it's easy to see why, since there are so many of them that they wouldn't fit on a reasonably sized talent description. That should have been a clue that you were making it too complicated. If there must be different types of images, then I'd suggest cutting them down to only three. Wolf, Knight and Nightmare seem like the most distinct ones to me, but I haven't tested how they actually play yet, so a different trio might work better. Oh, and it works with Blighted Summoning when it really shouldn't. Please don't acknowledge Blighted Summoning's existence and maybe it'll just go away.
What does the illumination status do and what does it's power mean? Sparkling Cloud needs to explain these things.
Photon Pull's cooldown seems pretty large for the effect it has. Haven't tested it though, so it might actually be fine.
Inversion Mirror is pretty weird to me. There doesn't seem to be any way to guarantee that you'll be hit by light/dark damage, so there's no reason at all to invest in it.
Why does Brilliant Vortex deal physical damage? The class is nominally split between three damage types, which is already more then usual. Pick one of them for it to deal instead. My vote is arcane.
Illusory Insanity is in the same boat: Mind damage might be thematic, but it should really be arcane/light/dark damage like the rest of the class.
Frightful Aura should be more specific about what it does. How long does it stun for? Does the stun check saves? Which save does it check? Which power does it use? Is "attack power" weapon damage, physical power or accuracy? Does the intimidation check saves? How long does it last? How long does it last? Which save does it check? Which power does it use?
Image Self seems like it could be silly, but I'll reserve judgment as I haven't tested it.
I'm not sure what Channel Image does. And why do I care that I can cast Illuminate through it when Illuminate is a waste of points in the first place?
I'm not sure I like what Master Illusionist does, giving a bunch of random benefits to other talents.
TL;DR: Remove Disruption Shield, scale your talents properly, don't get so caught up in the flavour.
I haven't checked out Arcane Trickster because I have no interest in a rogue subclass, but it looks like an unfocused mess of random abilities from your listing. Oh, and Street Golems' "pool of random upgrades" sounds just as awful as the different types of image were for Illusionist, at least if I'm interpreting the summarized description right.
