Quoted from hz
Scout has too much to do than maincall. I tried it but I was getting to a point where I was becoming a part of the combo too much. Soldier combo is in the best position to main call for a team since they know the position of heavy classes and what not. P.S; I have to do a lot of micro-management for my team as a medic. It can be hectic but worthwhile since they start adapting to it automatically later on. :PI prefer demo/medic calling