Thanks to Chimairamon's evolution paths, I was able to make exactly the kind of evo path I wanted for Greymon and GeoGreymon like by having branching perfects.
Now I can finally have two of my faves in one device in the evolution path I wanted (ShineGreymon and Gaioumon).
Gotta make use of the jogres as well:
RizeGreymon + Mugendramon = Gundramon (just my wild idea of what if we give Mugendramon a gun)
ShineGreymon + Darkdramon = ShineGreymon Ruin Mode (Digimon World Dawn/Dusk jogres reference)