I am using my 60 mage on classic to level 4 others to 60 and that will be my team. I may clone them to classic forever realm and I am a bit worried about the difficulty of movement heavy TBC bosses without input broadcasting. I am going to give TBC a really good try, leveling through dungeons with druid tank, resto shaman, fury warrior, mage, warlock. Using WowOpenBox. I know it will be difficult. I can think of more then a few heroic (even normal!) Bosses that may prove quite hard due to combinations of movement, heavy group damage, but as long as it's not impossibly hard I think it will be a fun challenge.