You can make many different adjustments to your Kill Team in this mode. This gives you a great degree of control to correct mistakes.
Be aware that issues may arise from using Manual Mode, such as having too many points to spend during Recruiting/Rearming if you remove equipment from a Fighter.
Looking to challenge Da Boss, but he knows he needs more dakka before he starts the fight. He smacks enough boyz to to join him in a good fight, and to loot whatever's shiney.