It's either/or. Either Rashard or Hedo. Both guys won't light up the Lakers.
Ariza will be on one of 'em and that should be enough. Odom can also take
The odd man out is actually either Bynum/Gasol since one of them has to guard a much smaller/quicker player. Pau's pretty mobile for a 7 footer. But on the flip side, if Bynum or Pau can dominate the much smaller Rashard/Hedo then they earn their floor time.
And one other aspect, Bynum/Pau have a very good chance of getting Dwight into foul trouble since Rashard or Hedo are under-sized PFs and will need help.