Turns out I did have enough time to get through this, lol. You asked for feedback, so keep in mind I'm going to be very strict :P

• You could probably add a few headers/banners to spice up the monotony of words. At the moment, the guide looks very bare. Look around the artists corner, and you could probably play around a bit more with columns/tables as well for some more fancy layouts. You could also embed images of your mastery trees or rune pages just as a visual aid.
  
  
• "The way I play Singed is as if I am a very selfish and greedy person, either farm all day or try to be part of every fight for that gold. I tower dive... A lot. I like to execute myself as well if I'm in "trouble". Everything in this guide is of my preference and it works for ME. Which doesn't mean it will work for you. Most importantly have fun!"
  
  ^isn't a very good way to start a guide. It's a common thing that I see new guide writers do, but the reason why you're writing a guide is to teach your readers of the best way to play a champion in a certain role, not show them how to play in a suboptimal fashion. "Selfish and greedy" is not optimal in any build, and neither is farming all day or diving every gank :P Your job as the guide writer is to teach your readers how to find a balance between farming and ganking so you can get your laners ahead without falling behind on exp yourself, how to properly execute a tower dive by juggling turret aggro or setting up the wave so it's not even necessary, how to know when to take the kill and when to give it to the right person if they snowball better than you (such as a Kat or Vayne), etc.
  
  If you insist on saying that taking kills for yourself is the optimal way to play, then provide reasoning. Does Singed scale into late game? If so, why? How can your readers use those kills in order to achieve those results? What's the best way to manage your money/build so that you can justify taking kills from other snowball-y champions?
  
  
  
• "The items I have put in the guide are ones I use all the time. You don't need to have the same items as me because that's just how I play Singed jungle." <-- same idea here. Your job is to teach why one item is better than another. If your readers just went with their "personal preference", then what is the point of reading a guide? Go through and flesh out every single item that you mention. For example, you said to have Dead Man's Plate in your final build. Why is that a better choice than Frozen Heart? Are there any situations where Frozen Heart is the better choice? Are there any situations where you would get both? Are there any situations where you would get neither? What about boots? Aren't Merc treads really good against heavy CC teams? Why would you choose Swifties over them? What about heavy, all-AD teams? Would Ninja Tabi be a viable choice, or would you rather go all Armor items? If your team already has a lot of damage, is it still worth getting Rylai's or should you just go straight tank? etc.
  
  
• I can't really say anything else because I don't actually play Singed, but the things I've said above are just some general guidelines to follow when writing a guide for any champion and any role. Over all, I think you could go through and talk about everything a little bit more. You have the barebones of what you need, but to make your guide shine you need to go the extra mile. Don't leave it to "personal preference". Explain why your personal preference is the optimal to play by giving justification for every statement that you make.

Yea, the reason I haven't used tear on Singed is because i don't think he needs the extra mana mid to late game because he has good mana regen. Archangel would be pretty good on Singed because of his passive but you could just build like a Righteous Glory instead and use it's active for the speed boost later in engages. Archangel would basically let you keep the poison on the whole time which does sound pretty interesting I may try it soon.

actually he is pretty stong at jungling in early. I can do all the camps without a first back

You never use a tear with an archangel?