First time poster, long time lurker.

I love the new video game. Like…teary-eyed-at-the-ending-love this game.
After beating it on Experienced, though, I needed more. Lacking any multiplayer (playing on the PC), I still wanted more and restarted on Professional. I now find myself playing the same parts over and over again and wanting to shout profanities at the screen.
I'm currently stuck while fighting the Azetlor at the end of the library level. This was tough on Experienced, but on Professional….wow. I've replayed it 20 times and even gotten it down to 1 hash left in the health many times but just can't finish it.
Problems I'm Having:
- The Azetlor's area attack is huge and by the time you stand back up from the first attack he's already recharged another one.
- The Ghostbusters AI is useless on Professional. They're basically just there to keep you on your feet. This would be fine except that they typically go down in one hit and never dodge anything. They also waste time shooting at Book Bats while the Azetlor smashes them from behind.
- The Azetlor is too huge and fast to avoid. He can be right on top of me in about 4 steps from the complete opposite side of the map.
Things I've Tried:
- Strafing around the Azetlor while trying to avoid his ranged attack and keep the GB's on their feet. This doesn't work because I usually die trying to help the other GB's.
- Going back and forth between the portals and taking potshots from across the map. This works but takes too long without at least a little help from the other GB's, who go down in 2 seconds. With the sluggish running and dodging the game has, all it takes is one small mistake trying to book it for the portal and I'm dead.
I'm stumped and very frustrated. I'm terrified of what the stone angels are going to be like. Complicating things even more is the fact that the PC version runs terribly on anything middle of the line as far as systems go. Aiming is very difficult with the choppiness. Please, any suggestions are appreciated.
He just seems too huge for the map. All other huge ghosts in the game just float around the scenery while you fight minions or take potshots.