Really nice guide. I like the structure and quality of the content, it's also a bonus that you kept it short and simple while still pointing out many important facts and probelms that occur in arena.
In my opinion, this article is more useful and better than most of the stuff you would get on sites like SkillCapped etc.
The only thing I want to point out is, that getting gladiator isn't just as easy as it seems with the topic title. You need to have in-depth knowledge of the game and all classes, to be able to deal with all the situations that can occur. The standard 1200-1800 rated player (90 % of all arena players) doesn't have that usually. This, coupled with the right teammates and a lot of dedication is needed, you can't just learn to become gladiator with just reading a guide, no matter how good the guide is.
By the way, it would be nice to see a general guide about arena from you, or guides about specific setups as well!