You won't get a guide on a specific class, but you might be able to find a class already done that has similar abilities that you can look at in the editor.
Some guides/help:
Editor > Help > Help on using the editor (This includes classes)
Shadow's notes on the editor
LW Hero Lab
videos on YouTube
A lot of what you want is likely to be copy and paste into the editor, then getting harder when you start doing class abilities, etc. Generally, the best start is to "New (Copy)" something that already exists and modify it, if you aren't comfortable doing your own scripting.
If you run into trouble, start a new thread and explain what you want, what you have done, and what doesn't work.