I realised I have a save of Chapter 6! So I can now give you..
Chapter 6
Main Quests:
1. Cave (arrive at Kar'gath, explore)
2. Destiny Awaits (kill 4 magic generators so you can get to Xada)
3. Revenge (Kill Xada and get Galeoth after)
4. Nemesis (Run back like a madman to try and catch that Archimonde wannabe unawares... aka end the chapter)
Side Quests:
- Kill 5 Generals
- Get all 4 keys
- Forgotten Ones (make staff, suck up 4 midgets, kill the 4 big things)
- Not sure 1 (I can't seem to find two of the side quests, could be because I did stuff in the wrong order dammit)
- Not sure 2 (I think there is a cage quest or something, I don't remember fighting the butcher in this playthrough either)
- Elite boss (protect the goofy orc and kill the massive Esper)
- Epic boss (some dragon)
This is another chapter where the order of stuff is damn important. Like doing the Elite Quest before fighting Xada, and other stuff (for example, I couldn't get to the Epic Boss even after clearing the entire map and running around in the Northwest room for ages - this is actually one of the main reasons I am requesting Doom to write such a guide about "ordering" of quests/actions)
Thanks!