Maybe this belongs in the support section, I'm not sure, it's a bit of a mixed bag. Anyway.

#1 The Key of Allard. I've found and killed the two demons but they were both in the same army group. So now I only have one half of the key (presumably, nothing shows in my heroes' inventory) and there are no other demons on the map (that I can find). So is the quest broken now or am I missing something? 

#2 Ku'o Sian. Ok, I hate this so much. He won't join you if you have Gnarri in your group, otherwise he gives you the quest to search for the golem pieces before he joins. This one thing turned the whole campaign from fun to horrible frustration as I ended up searching the entire map avoiding (unnecessary) fights and not doing quests as I didn't want Ku'o Sian to miss out on exp. I wanted to do his quest before I move on to anything else. 

The only piece I've found on the entire map (the part of it that is accessible) is the one in the darkling village. I hate how terribly vague this quest is. Do the other pieces appear in much later stages of the campaign? Am I just wasting my time? Is it safe to hire Gnarri after Ku'o Sian gives you his quest, would he still join once it's complete despite Gnarri being in the group? It's so annoying having to avoid the part of the road where Gnarri is standing for fear of his joining being triggered. 

Any light shed on these things would be appreciated.