Help me understand t10 a bit

[Sessurea]

Some blms fall to pieces when they have to move. You often see blm cited as the easiest dps to play due to their short and simple rotation, but the "always be casting" has to be learned through experience. BLM is definitely the hardest class to play in movement heavy fights. The striking dummy is least useful for BLM, out of all the dps classes. And t10 is stupid easy for melee dps. ( in fact all of final coil is pretty easy for them? xD ). Just to note also, t11 and 13 are the harder phases for BLM than t10, a lot of movement which can interrupt blms.

Your sure one of your BLMs wouldn't fancy playing a melee?