the skill sequence is almsot farming focused, not my fav since Wither is so strong.+ maximizing ad more then as is beastly with nasus imo. try using some codes for item-pics etc. other than that this build is prob fine.

Pretty good guide although it could stand to have a few more pictures/rollovers for the items and such. You can do that using bbcode with square brackets (a more indepth guide to that is here).

As for the build itself, it is, as you noted, increadibly, incredibly easily kited because he has one of the shortest melee ranges in the game. Even with all the MS bonuses from Phantom Dancer, Nasus is a melee champion and will wilt if focused, especially when he has almost no health and resistances (as he does in this build). Also, a very significant portion of your damage comes from your Q yet most of your items boost AS, not CDR.

Unlike every successful melee carry, Nasus has no gap closer. His slow is nice but tenacity of any kind makes it mediocre at best. Since Nasus has no gap closer, I also disagree with your skilling order. If you're last hitting with your Q, you should be able to keep up with any damage increases you'd get by leveling it. Instead I'd focus on maxing out Wither early (for its strong slow and early kills) or maxing out Soul Fire first (for its strong farming ability).

As a suggestion, you might want to think about a Force of Nature instead of a second Phantom Dancer. It will give you quite a bit of survivability (especially against AP teams) and also gives you 8% MS. You also rely a lot of Nasus' innate lifesteal to keep him alive in fights and while 15% is nice, it probably wouldn't hurt to supplement it with a lifesteal item or two.

Still, I can see it being possible to do well with this build as long as your team understands that you will not be able to tank at all.

+1 if only because it's different.

First Guide, Wanna know how I did give me a shout guys.