Level 80s who single target groups of mobs

[Absurdity]

Well sometimes there is one thing you want to kill fast before aoeing the rest, or in some classes like monk I want twin snakes up for the aoe, also its nice to dot 1st then aoe in my opinion. On paladin i single target after my aoe combo so i can build my mp back up for next big pull

What aoe combo are we talking about? Because your basic Total Eclipse -> Prominence combo already restores MP.