That is why he is fourth choice! Personally we need other positions first - left winger, left back, creative midfielder then possibly a striker.
It doesn't really matter what order they are addressed in; there are only 8 days left in the transfer window. It's not as if they can't work on multiple deals at the same time. If we can find a better striker than Armstrong then we should bring him in. Armstrong doesn't look quite ready to be playing at the top end of the Championship to me and he won't get that many games if he stays here so a loan to another Championship club is the best move for him IMHO. I think Rotherham were mentioned as wanting him which sounds like a good move for everybody.
Semantics, first choice as in starting. If Gayle or Perez is out for a few weeks and Mitro suspended, then Arma's starting. He's too close to the first 11 atm and we need another top striker.