I'm sure most people know, but I recently wrote a guide on Ao Kuang. Anyone who hasn't seen it should check it out here. There is a lot of work in that guide and I'm a bit disappointed that it isn't as popular as I wanted it to be, but there's plenty of legitimate reasons for that.
Anyway, I am definitely planning on:
1. Updating and bettering my Artemis guide, for like the 5th time. The current version can be seen here. I am extremely happy with the amount of views and votes it has received, but I want to make it better and much more informative.
2. Making a Cupid guide. I have been playing him much more often, and am learning him quite well. There are a lot of Cupid guides from 2012, but many of them are not updated and I want to make one in my style.
I considered making a Freya guide, but there are already a lot of good ones so I'm not sure.
If there is anything that anyone wants to see from me, or expects from me, feel free to comment and tell me. I would love any and all feedback/suggestions and I want this community to have the best guides I can possibly deliver.
I will look into that Agni guide. I think it will be a good opportunity to both learn the God as well as better the site with another guide.
As for me, I know the feeling - it took a while for my Hel guide to get some love, but, because there were no other up-to-date or good Hel guides published, it eventually saw enough attention. I hope more people upvote yours, as you clearly put knowledge and effort into it, but as I upvoted it a while ago, I can't give you any more bars.
I have checked the top guides (and most of the highly rated) guides for almost every god, and I sincerely believe that Agni needs a well-written guide more than any other. It will probably take the most time, since you'll have to be good with him if you want to write a good guide. But, he is one of the star midlaners, so he probably would have high-traffic (meaning you'd get a popular guide) :P
I'm aware of Piederman's guide and it is quite excellent. I am still disappointed in my guide's success considering the quality of the guide. I have seen guides for older Gods be made recently and they get quite a lot of both votes and comments, so I have a feeling that it has something to do with me. That's half of the reason I changed my avatar to Haruhi.
As for your Ow Kwang guide - it's an excellent guide, but you'll find it's hard to get a guide popular unless it's for a new god, and if other guides for the same god are on par with yours. (Piederman has a recent guide for him that is excellent as well).