Mograph Random Distribution / Groups Falloff Questions

Hi Hi
So Two Maybe obvious questions.
Firstly:
How to a randomly distribute instances of different sops on a grid.

Lets say i have a Grid and i want to instance 10 different sops on it, like different import objs models or 3d shapes etc.

Second lets say i have a group that transforms points in some way how can i have a fall off on the bounding box or sphere so the changes fade in rather that pop when the change from one group to another and the bounding box or sphere moves around.
Again like c4d Fields and mograph falloff