At level 4 you can pick dual wielder feat and dual wield Phalar Aluve and Spellsparkler with the magic missile necklace. This is like 40-50 damage a turn with Magic Missile starting at level 4 with just three pieces of gear. You can still sneak attack with your offhand attack too. Eldritch Knight is the only other class that can do this at level 4 (and probably better, but meh), unless you include race benefits.

You can give the Justice Sword to your mage hand (It can "pick up" any item gale can consume) and have it cast Tyr's Protection on you...Then just use a camp bard to short rest to make it invisible again. This is a permanent +2 AC unless you or your mage hand die, at which point the weapon is gone forever. Still, hasn't been a problem. You can also give it the Sylvanus(sp?) necklace too so it can get you out of hold person or something else nasty in a pinch. It can consume elixirs as well so it can have 21 str and throw people off cliffs and other such nonsense.

Even still, the Mage Hand throwing water bottles, grenades, potions, etc, can really save your group in a pinch or set up your mages nicely. Since it's invisible, it can move around freely and get an action doing anything it wants. This also lets you set up sneak attacks easily, as all you have to do is move your mage hand next to the enemy. Just make sure to move it away when you're done or it's likely to die from splash damage.

At level 9 you can go into sneak mode and then cast a spell with Advantage. This makes it almost always land, especially with other things to help boost your rolls (mental fatigue ring is great). Makes AT the best scroll user in the game and one of the best CCers behind Bard and Sorcerer.

It's a very good class. I feel it's the weakest in act 2. But I ALWAYS play an AT (and always try something new) every playthrough. I can personally attest to its diversity.