Every SOTR extends the duration up to 13 seconds.
You generate HP faster than your SOTR will fall off. SOTR is off the GCD, you can spam it while building. We also have Bastion of Light every 2 minutes.
Here’s my attempt with 98% uptime on the raid dummy before splatting. ( I don’t even play Prot )
Literally flooded with resources. SOTR will not drop off even without Avenger’s Shield no longer generating HP.
I don’t think OP played Protection longer than it took him to type this post. Nobody else called him out on it but jumped straight to D3 talk.