Attach Minis to other minis - (grappling large creatures etc)

What Feature would you like to see included within TaleSpire?
If you could set attach points on minis themselves (above and below) You could attach minis to other minis. This is for circumstances where minis are grappling monsters, riding creatures etc.

What situations would this Feature be useful?
For instance, we have had instances where we are doing a chase and the characters are on the back of griffons, trying to jump between griffons as they fly over a city.

A thief bounded up a wall and onto the back of a T-Rex and was attacking it while it Rampaged.

A paladin leaped down from a roof onto the top of a Treant to chop at it as it stomped around.

There have been many times we have had this sort of thing happen, and managing it is a bit easier if we could put these things roughly together where they should be.

This also might be a nice way to move a party. Currently you can circle select a group, but if you were to attach all the group to one character and move the one character that would work as well.

(Sort of a parenting option, make all the other characters a child of one character and then unparent it when you wish with a click of a button or something like that.)

Additional Thoughts/Details