The first time I played Ego Draconis (the original, not DKS), I did the quest delaying thing in Orobas Fjords, and saved the Ballistae towers for that too. I reallocated my points to max out Wisdom and handed in a ton of quests all at once, and I think I reached level 37, which is one-level higher than I've reached since playing through that part of the game, but I don't think it was worth it.
Now the only time I delay quests is in Broken Valley, because just completing the first part of the main quest of finding three people who've seen a Dragon gives you like 2-3 levels, and the next stage of kiling Arben gives another 1-2. Instead, I try and clear out all the monsters from Broken Valley north and get their XP while it's still worth something.
I never put points into Wisdom or Mind-read, but I always save jewellery I find with that stuff so I can get benefits without spending skill points.
