This is interesting, let's see...
Firstly,
DhakhaR seems like an obvious choice, as he brings not only top-tier technical skill, but also tremendous technical knowledge on how the game works, which could take a city one step further and implement some interesting functions while still being vanilla compatible.
Secondly,
PUP, great builder with a flair for fantasy and seemingly endless stream of ideas.
Third, I'd pick the incredible architectural/ exterior builder
Artyfacts, provided he's not too busy XD
Fourth, I'd have
Count Bane as the main interior decorator. He really has a way with making interiors look alive and natural.
And finally I will round up the team with solid all-rounder and landscaping expert
FiasWorkshop!
All of them have great knowledge of the Infinity/gizmo combo so the goal is the Ultimate vanilla-compatible city! Let us dream that some day, Iron gate will pull out a miracle and give this great game the optimization it deserves!