Back on topic, will look at picking up Sub for a progress week when work allows - going to run a flex with it on Friday to prepare. The best bosses to judge Sub on would be Malkorok-Thok-Garrosh-Norushen-Sha of Pride <-- that bunch I assume?
What would be an acceptable level of Find Weakness on a single target fight? I'm assuming there's a value like there used to be for Shield of the Righteous for protection paladins (i.e. if you could maintain 42-45% uptime, then you were starting to get the hang of it).