1-3-1 is the best defense against motion since there is a lot of mid range shots but your problem then will be with your PF that probably won't have good outside def to be able to defend in the 3 players defense line and if you put a guard in the PF position you will be in a huge disadvantage in the rebound aspect which already suffers a big hit in this zone.
Use 3-2 only if the other team scoring big amount of 3s every game, but if its around 6-7 3s a game i will go for M2M and put my 1st best defender on his best shooter, 2nd best on his 2nd best shooter.
Im not a fan of 3-2 against Motion honestly, it seems to work way worse than people expect it to work.
I agree 1 3 1 is the best defence only i think not importent PF have good outside defence i think you think SF
you said mistake or realy belive that you said..
SF need outside defence for this every unother you said is corect i belive that i see the game this because i said this
lp