I think you may be using AE the wrong way. What is the approximate duration of this composition?
One uses AE to create shots. It's probably the world's worst video editor. Segment what you are currently xoing into shorter pieces, reduce the number of layers in each comp, render out the pieces from AE, assemble them in an NLE, and think of a more efficient workflow for next time..
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA