As a monk, I usually just adapt my positioning to what the tank is doing. Very rarely have any problems with that.
The only thing being tanks, who keep the backs of mobs either in danger!puddles, or in AoEs (Gubal Library hard, boss1 comes to mind). We need both a rear and a flank, dangit. T.T
In general, based on what I see here, seems like you're well on your way to good tanking, buddy ^v^