I have played a Guardian so far to level 12 after trying a Captain and Loremaster. For those other two classes, I found soloability to be quite difficult, particularly when adds are involved. Haven't died so far with the Guardian, even with as many as 3 adds.
One of the things I like most is the ability to chain moves together... it makes combat much more active and interesting. My question is regarding the Champion... does this class have damage mitigation that rivals a Guardian? How is the soloability with adds and whatnot?