I think you still have two seperate acts to deal with here
1. is the T for illegal entry
2. Flagrant T for unsporting actions (non player intentional contact with player during live ball)
eject A6, have B shoot 4 FT (coach picks the shooter(s))
and if there is time left give the ball to B at the appropriate location (NF or NCAA)
After game report incident to state or conference commissioner.
If you really want to pile it on

just playing)
1. is the T for illegal entry
2. Flagrant T for unsporting actions (non player intentional contact with player during live ball)
3. T for having more than 5 on the court.
4. Flagrant T on assistant Coach (NF only, so you can send the kid to the locker room with an adult.)
5. after you report all these T's, T up the head coach when he goes ballistic.
Have B shoot 10 FT's
Give the ball to B at appropriate location with 4.2
left on the clock(last time I had definite knowledge
before incident).