Wow, I don't know how I overlooked it, but none of the three quests in Jad's Folly are shown as completed when they should've. On the file you gave me, you do still need to find one miniboss battle- which is somewhat more bugged than I expected. Fortunately, that is all an easy fix I've already implemented. I can easily set the ones that didn't show "complete" to do so when you get the final cutscene leaving Jad's Folly.
Scorio was definitely not made with the Friend Defender in mind- I'm guessing he was trying to land Abyssal Curse on Garett only for Brill to keep taking it thanks to Friend Defender. It should be simple enough to let him get around that, though- that way he isn't completely trivialized. I'll adjust his AI while I'm at it, he should be using Hex Thunder a bit more than he does and definitely should not spam Abyssal Curse when one of the characters is knocked out.
Reflected attacks will hit the proper target even with a defender in the way. You can probably make use of this in a few places.
I'll go through each issue and see what I can do about the broken stuff (as well as buffing those elemental amulets- I think 30% Amp and 40% resistance are justified at this point). Then I'll give the impassable follower bug a look and release a patch most likely sometime tonight.