The City of 7 Seraphs d20 system but I am uncertain about

but I am uncertain about the bloated one

#1 With A Bullet Point: 7 Feats for Flying Foes

begin with the walls and use the Options Ruler

and power armor they use to great effect

The City of 7 Seraphs d20 system but I am uncertain aboutEnter the nexus of the planes with The City of 7 Seraphs, a comprehensive planar metropolis setting for Pathfinder RPG. This ambitious campaign setting transforms your game with a living, breathing city at the crossroads of reality. What's Inside: Complete planar metropolis setting Unique factions and power groups New character options and classes Planar magic and mysteries Adventure hooks and campaign frameworks Compatible with Pathfinder 1st Edition