I am playing a Fighter using a heavy shield, and looking at feats like Encouraging Shield and Stout Shield. They're nice in that they stack with Improved Defenses, but the lack of scaling makes them less appealing. Is there any way to increase the shield bonus granted by my shield?
I know about Snapping Testudo, but I'm not willing to focus my entire build on shields, so it's not a viable option for me. Feats like Shield Specialization, Brawler Guard, and Shield Defense, while nice, are not what I'm looking for here, since they won't actually increase the bonus I get from Encouraging Shield.