You still seem to fixated on this idea of combining Chase (or similar) points with AA miles, even though several us have explained to you that this is not possible.

Combining miles from two different AA accounts is also not possible for all practical intents and purposes (i.e. transferring miles is almost as expensive as buying points outright and transfer upon death definitely is out of scope).

Finally, while there might be an exception or two in existence somewhere in the points universe, you can't book an award ticket with one currency and upgrade with another.