Hi! The expression(s) that you are looking for are way out of my league – I am a sometimes AE user just to get small projects done.
I do not understand how you want to use the resulting footage, but it would seem to me that you just need to make the comp large enough for all of the effects to render within the frame.
You have likely already thought of this and ruled it out, but I know that sometimes I spend days trying to solve something that I have overlooked.
Hope it helps!