What a fun question!

My first attempt to multibox was four boomkins during the last summer of BC. Two were on accounts I still have and two were vanilla only accounts that faded quietly into that good night when I started RAFing (you can only RAF chain off of one or two accounts).

Luxxi, Luxee, and Luxxee Luxxie?

Two are level 90 bank alts that healed or tanked a bit in their day, (but because of ah camping, Luxxi might be my most /played character) and the latter two are gone.

My only vivid memory was getting the team to level 45 or so and deciding dammit, I was going to try an instance, how hard could it be (without glyph of restokin or a dedicated tank.... too hard!)