I am slightly newer to prot warrior, but feel i’ve got a fairly good grasp. I’m assuming you’re talking about a boss because you mention single target.
My thoughts: Shield block uptime is important, but if it’s going to drop while your enemy is casting THAT IS OK. Ignore pain uptime is important, but if it’s going to drop while the boss is doing a group mechanic THAT IS OK.
I prioritize Shield Slam first, always, then if Thunder Clap won’t overcap rage, I will press that, then Revenge. My goal is to keep my rage generators always on CD if they won’t overcap me.
CD’s
I will press Avatar on CD, provided the pack will last the entire duration. Holding Avatar is pretty much never OK due to Anger Management. After Avatar you should always spend your Outburst on Shield Slam, unless it’s your first few CD’s and you’re grouping mobs, then TC is ok… I always try to Demo Shout after Avatar to maximize the dmg multipliers.
Banner Lasts so long, that you will, so long as you play moderately efficiently guarantee at least 1, maybe even 2 Avatar/Demo Shout Windows in your banner. Because of this I will NEVER hold Conq Banner. I am playing this leggo to buff my group, not for my damage.
I think that perhaps moving TC above revenge in the APL if you won’t cap might make a pretty significant difference for you because you will generate more overall rage over the course of your banner and increase it’s uptime.
TL;DR, more mastery for your group, more better. Generators>Spenders if you won’t cap. CD Sync important, but never hold Avatar.
If i’m way off base anywhere, I’d love to here any modifications. I’ve been running prot for about a week, but played various tanks for 2 xpacks now.