To be successful be sure to update your story regularly, so fans have something to look forward to every one or two weeks. Stubbornness is the key here, especially with webcomics—it's hard to have a fan base with just one or two pages. The more and the better story you deliver, the more people are going to get hooked up.
Be respectful to your readers and interact with them as often as possible. Answer questions, have fun in the comments, share your thoughts, organize small contests or giveaways.
Try keeping a relatively consistent style of art and writing. It doesn't mean that all parts of the story have to have the same mood and/or art style but it's best to pick 1-3 genres and stick to them.
Or just be like us—scrap the theory, do none of the above, and hope for the best.
3.What are the essential elements of building a complex escalating story world? Order of importance of these elements?
Have a top-down approach. When imagining your world, set a few basic rules for it and start from there.
These rules can be anything from "all animals can speak with humans", through "rain raises instead of falling down" to "ghosts are real and everyone knows that."
Build your story around it and keep questioning everything.”
Make sure your story makes sense within your universe. Think what would happen if your rules were the same but the story different. Always come up with more than you want to tell. The world you build is as important as your story, and can greatly enhance it. The rules we set in our stories are usually bits taken from different mythologies from around the world. We don't like to hold to them too tightly though and usually try to twist and turn them in a way that makes the stories fresh and interesting.