[the_logos]

You don't need a 'system' to participate, particularly as you can set up server-side curing and now that affliction status is sent to you out-of-band via gmcp (figuring out what afflictions you had and curing them was the raison d'etre of most systems in the past), but 'system' is also a pretty encompassing term that includes things like dynamically highlighting names based on their enemy status to you or attempting to help track what afflictions your opponent likely has based on the imperfect info you can gather from the game's output.

You'd certainly want to set up aliases and macros to help you, of course, as nobody can type that fast.