Dear all, thanks a lot for your very valuable information! I am currently in my first run (normal run, no dark urge), and just received level 10. Therefore it is fun trying out the result of your suggestions.

@fylimar: Sword bard: In the standard setting to my info WIS would be around 10, please could you tell me how you solved your WIS rolls for resisting (could you avoid by dialog options? Did you level up WIS via ability improvement (either WIS points or other feats like "Resilience" or "Astral Knowledge" from Githyanki to improve WIS?)