I'l try - and made a sample part, i think with some pics its more easy. The part is not realy difficulty und if i realy have to make it, i will make all with the same tool. - But for explanation it's enough, i think.Personally I'm not very familiar with the router workflow. If you could write that up, we can start looking into it.
Sitation, - i want to make this part: Only four single parts, here placed on the top of my machine table (the light blue area) Let's going in mind, that we need to use three different tools, a drill for the holes, a special end mill for the green signed areas and a other endmill for the outlines.
Especially if you not have a automatic toolchanger (and i suggest not much privat user have one ) its important to work "tool after tool".
Next thing whats important if you use a vacuum table: allways work from small to big. The reason is easy: each cutting line weaks the vakuum, so if you make little cutts first you lose not much vakuum.
The way for this parts will therefore be:
1. drill all holes
2. mill out all pockets, gooves which are not going down to zero.
3. cut outlines, if you have different part sizes smallest first.
On that parts i will also not cutt out the big holes as pockets, but as contur.
The workflow for point 2 and 3... There i haven't a idea how to realize if the stepp is boundet on a single object.