Its up to you, your at a high enough level that you could complete it easiy, and it wont effect the other storylined parts of the game. That and you can do each level whenever you want because there are exits from each level back to the outside. Basically its your perogative (spelling?), me i did it as soon as i could cause i found some great items, and the exp helped later on.
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\"This is a revolution of the mind.....\"
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