Hellow Wizards!

I am working on a FLIP simulation that in all seems a bit too long to simulate.
The good thing about it is that the motion has some "rest" moments.
So my idea is that these rest moments act as "blending bridges" between them in case there are retakes on any of the stages. That way I can only resim the retake part and not the whole sequence.

For example:

Tank Filling Up -> Water Comes To Rest -> Water Motion #1 -> Water Comes To Rest -> Water Motion #2

What I would like to achieve is a way to have for instance, the "Tank Filling Up" motion to blend towards one frame of Water Comes To Rest, which will be used as initial data for the other two Water Motion clips.

I just started to look into a solution like this, but would be great to have some professional advice on how to achieve it.

Thanks a lot!