I love this mod, but I find it hard not to cheat when trying to climb the dark tower. I've yet to legitly make my way to the top. I get about half way, then one of those insects grabs me and throws me to my death, or its pitch black in one of those "no build" zones... with no way to really get by it because you can't see and there's no lamps nearby. Even cheating, as in, when I die I TP back up to where I died, it still took me over 2 hours to climb it!
If I ever had to go through that nightmare again, i'd probably just take 30 stacks of cobble and build straight up on the outside of the tower, which would take 1/10th of the time of actually climbing it...