It seems like quest givers are generating quests "towards" each other randomly. Why not give them a bit of relationship flavour?
Give quest givers opinions of each other. Maybe Wothendal really hates Siggurd, and will always generate mean emote quests for him. Perhaps Erkenwine is trying to woo Gerurd in a spicy tree/rock interobject relationship, and will generate gift quests including bouquet of flowers.