It would be really awesome to have this feature where like say there is lips and on the upper lip can put a deformer in the middle of it to change the movement of it, but a second envelope deformer that goes around the outline so you can change the shape of the lip as well.
You almost sort’a can do this, but it’s tricky and probably wouldn’t give a very good result,. You would be better off just breaking out the lips into two separate elements with their own deformation. However, in a pinch when dealing with less than ideal elements provided from a design, I’ve used multiple chains on a single piece of artwork…and got mixed yet for the job satisfactory results.
You can build two chains, and then pull them into the same group and then use a Deformation Composite to bring the two chains together. The Deform Comp is more or less legacy and was once used for multi-chain builds, but you can still use it here to achieve what you are looking for.
Again, I wouldn’t really recommend this, but there you have it!