Ugh the wise speaks the truth. If it's not fun to you, what's the point? That being said depending on what your goal with multiboxing is can determine what classes you would want to mix into your groups. I have several teams myself for a variety of things. Some I enjoy pvp'ing with, some I enjoy pve'ing with, some I just enjoy leveling and screwing around with, but if you are willing to put the time and effort into it anything can be viable especially nowadays.
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