Ok, first off, the campaign is great, complex, has some puzzles and up to this moment, i like it, yet, there are some things i wish to recommend.
camera could be optionally binded to the player unit, so, in boss fights (like with the giant murloc) it's simpler to follow your character. This is a minor annoyance, but it disappointed me from the very beggining, to be honest.
Chapter 3, where there are 2 crates next to a harbor that are supposed to be use with the hook spell, replace them with trees. The reason for that is that I went in that direction first, before heading to the small rat, but, on my way back to the temple and the small rat room, i used another route, and beforehands, i had destroyed the large crates with a ballista. What i'm saying is that it can get a player stuck if one does the same things i did at that point.
As for the ankh being, I have to agree with the person that said that unlimited ankhs should be given. Trial and error is quite often met in this game and it is quite frustrating to keep reloading your saves.
Another thing, which isn't really a bug, but just seemed completely illogical to me. What are the odds that there would be a room with throne and some trash in it, containing a key and several archers would be randomly running around there? Coulda replace with something more logical, but i guess it's okay if it stays that way, too.
Oh, also, the stun on the targets sometimes doesn't appear, sometimes it takes 1-1.5 seconds for it to appear, at least for me, which is clearly an issue, cause, if i perform the next spell (forgot the name, but you know what i mean) too early, it doesn't do the bonus damage, which bites my rear end.
Enough with the suggestions, as with the puzzles, they're great, but sometimes hints could be nice (you could implement them by setting off a timed trigger after entering a region with a difficult puzzle, from the observations of main character in first person, for example).
The one i happen to be stuck with is the same Div is stuck with. The only logical solution i could think of to solve that is to get them so that the catapults which are faced right and left face each other, with the left one being at the door, the upward/forward one fires initial charge, then the other two keep firing at each other and, with proper timing, it might be possible to replace the catapult facing left with the forward one before the charge has landed on the spot, resulting in the forward catapult launching a charge at the door. Timing here seems to be the problem, if this solution applies, though.
Wall of text crits you for 13'495!