I've noticed the past month you just post random questions. Have you tried asking in OOC before posting or is this a way to get the ol post count up?
Usually when newer players ask honest questions in ooc they are answered with a bunch of smart ass remarks from later game players like your response.
To answer your question, yes every character that is involved in combat should dump their aa's into ring of the ages. I say characters involved in combat because some classes are really only used for their buffs then are left to idle at zone because their benefits of tagging along with the rest of your party are minimal. Later on you will find that having multiple mages are useful because their spell call of the hero allows you to reduce time running around the zone; therefore, a second mage would be a great character to level up the mask on because you are really only using them for coth.