1. Instead of loading the same schematic twice, duplicate it in the instances section. This will create an identical schematic that you have already loaded with the keyframes used. Note that doing this also lowers load times for the animation.
- Do not clone it in the Library Section! This will add lag as if you loaded it twice.
2. Avoid using HD Textures until the final product.This is self-explanatory, as it's basically like having a Triple sized energy drink when you are already full. It will just be bad and feel bad.
3. Avoid rigs until the final product. This is basically adding 4-5 more timelines in your animation which isn't required. Only avoid rigs if you can, but if they need to be animated, use them.
Using these tips, I have been keeping my FPS above 90 during the animation process. It might help to try these out, see if they work for you.