I was just mentioning the GCD usage for the AoE rotation. The single target rotation has a little more meat to it. We also stop using the AoE GCD skills for single target unlike what happens with the WoW tanks. Circle of Scorn is still used being an off global cooldown. There are also mitigation cooldowns mentioned by the others. In a way, we can only fit so many spells on our keybinds after all. If they made the rotations more complex, some of the mitigation may have to be tied to the attacks then. Whether that works or not, I am not sure. I would have to see the planned kit first.

Single Target is something like this if we mostly look at the GCDs:

Physical:

Fast Blade > Riot Blade > Goring Blade
Fast Blade > Riot Blade > Royal Authority
Atonement x 3
The Atonements have good mana regen here. You might be able to sneak in a spell cast of Clemency outside of a combo if needed. Clemency is a targeted healing spell.

Spell:

Requiescat at full mana > Holy Spirit x4 > Confiteor
Return back to the physical rotation

Also for the spell rotation, you can alternate Holy Circle or Holy Spirit for Clemency. But as something to know, you shouldn't need to use this heal very much. The healers in this game have strong off global cooldowns to get your health back up with ease. Either the healer has to be very reckless, rusty or panicked from "poo" hitting the fan for you to need to cast Clemency.