I hate to say it but if you really read past all the bullshit on Arena Junkies from all the e-peen little gladiator kids, there is tons of good information.

I read the site daily and unfortunately you really have to read alot of the sections to find what you are looking for: (The entire Ask a Gladiator Section, 2v2, 3v3, 5v5 and also the classes you are looking to play). Its there you just have to read past all the trolling.