> Imagine if you had an Amiga Chipset and you had combined it with a RISC like chip

This was the plan for the successor machine, codenamed HOMBRE and never released.

An Amiga-like chipset closely coupled with an HP PA-RISC CPU.

https://en.wikipedia.org/wiki/Amiga_Hombre_chipset

A little more info in German:

https://www.amigawiki.org/doku.php?id=de:models:hombre