NO JUST NO!!! I play GP support, but Nasus is very farm reliant, or his Q will be useless. Just not a good idea. If you think he's shut down at the top lane, play him as a jungler.

Lol,you play all the wrong supports.Listen to me dude.Buy Janna,she is only 1350 and she is a true support and support with which you will learn what is support.Now for the build.If you are going bottom lane Nasus support,then I don't know what to say.If you say that people will disable Nasus that's true,but he's an off-tank,he is bulky and tanky while still dealing a lot of damage.That is the point of Nasus.Being able to deal damage and endure enemy attacks.So,it's more like this,if they disable Nasus,than your carrys are free to attack whom ever they want so it's a good thing. Nasus cannot deal much damage if he has no farm.If you think that he is not useful solo top lane champion,that shows us that you don't play ranked.I can tell that only character I can play good ranked game is Riven and that I'm not so successful with other champions,but I can say that support Nasus cannot perform well in bot lane.Only off-tank Nasus solo top can kick some *** late game.Don't get me wrong,he is weak early,but as you farm better he becomes much,much stronger.Just don't forget to use Q to farm.This is main reason he cannot become a powerhouse as he should be.

Meh. Nasus relies a ton on farm and you'll be giving it all to your AD carry. Then your Siphoning Strike won't do anything late game. The damage on his AoE (the name escapes me at the moment) isn't a whole lot to "poke" with either, I guess it could make a nice debuff to your carry. The only thing redeeming about Nasus bottom is that Wither is such an incredible debuff and slow and Nasus works great with Gold/5 items. No upvote, no downvote.

Nasus is a true bruiser, building him as a support could possibly work at very low levels due to his single target cc, but wither lasts a very short amount of time and is only single target. Maybe it's just me, but you're only building like 3 items and not finishing your boots in the build. But regardless of that, nasus' role is supposed to be to zone out ad carries and do a **** load of damage in team fights. If you lose out on that it might as well be 4v5.

Nasus is a true bruiser, building him as a support could possibly work at very low levels due to his single target cc, but wither lasts a very short amount of time and is only single target. Maybe it's just me, but you're only building like 3 items and not finishing your boots in the build. But regardless of that, nasus' role is supposed to be to zone out ad carries and do a **** load of damage in team fights. If you lose out on that it might as well be 4v5.

Honestly I see how this could work but I feel as if you are doing a few things wrong. First thing I noticed if take a point in siphoning strike at either 3 or 4. The amount of poke and damage it does is worth being able to use even if you aren't farming it. And also people take 0 cs way too seriously when playing support. I'm not saying actively farm because you aren't the best place for gold to go to, But when the AD isn't in lane you being able to farm your Q will make you suck that much less in late game. I'm not going to upvote because I hate the Idea but I'm not going to downvote either because I'll feel like a trollvote since you seem to have actually put time into this guide and it's pretty well written.

Yea as I said soz for yesterday was tired.
Anyways as other's said, you should give more alternative items (I know it takes time, not making you rush), some bb codes.
For examples for the bb codes, there are some template for this.
http://www.mobafire.com/league-of-legends/build/making-a-guide-101506#chapter18
The 2nd one in the chapter would be the pro's and con's template.
Anw gl, you're doing well now :)

You know, I think this build is very original and interesting. While I don't believe Nasus is a good support, because he has no means of sustaining his lanemate (heals/mana), and you can't rely on Wither alone as your mainstay. The reason nun is viable is because he has both a slow in Ice Blast and a steroid in Blood Boil. Still though I don't believe you deserve the downvotes you got earlier in this release, because I think this is creative and original and you explain your choices well. This guide could however, use a lot more coding and organization to make it really stand out so that people will be less inclined to judge it by the strategy/build. PM me if you need any tips on how to use coding because there are some amazing things you can do with it. +1 from me my friend I like creativity in these guides.

Teammates only rage the first few minutes in the champion select & after the game started, after the first kill(s) they usually were quite happy that the AD-carry in the team got fed. :P

The build is basically aimed for a high CDR and tries to make you nearly unkillable, so you can eat as much damage as possible, so your team only has to do the cleanup-duty. Every nuke/burst they waste on you is one burst less that your carries have to endure. :)

I actually think it's a fine idea, although you will definately fall back a bit later in the game, while there are several supports who wouldnt fall this much. I havent try, but I cant hardly figure how Nasus couldnt fall behind using this strategy.
But your AD should be FAR ahead of theirs, so I guess it compensates. Definately worth the lolz, the teamates's rage and the opponents's insults when they lose.

he is working. Yes, you can't harass with your e, but if you ping before you wither the enemy and your AD-carry joins you, the enemy carry has to fall back/recall, because otherwise he would take too much damage.

I agree: Harassing alone/with his skills is wasted mana, but if your teammate joins, your so called "harass" will be devastating. I try to get my LoL-replay working, so i can upload some replays when i play him.

I don't think that this build works not because it is incompetent but because nasus doesn't have any hard cc for a kill lane (granted he does have the best slow in the game, but that some times isn't enough) and he doesn't help his teammate at all without summoner spells. He has no ranged harass besides his spirit fire that pushes the lane and costs a lot of mana. This makes it impossible to bush camp.

Nasus also is very reliant on a farmed siphoning strike to do any damage in a teamfight. Unlike some tanks he can't do much more than tank with this build.

All in all you basically have a Nasus that is equal to a Nasus in top lane who doesn't last hit and just stays around getting xp.

I won't downvote since you probably put a lot of work into this but i'm just making you aware of why Nasus bot doesn't work