After playing BLM to 54, and War to 60 to have a sense of the fight mechanics, I would like to propose a small change to Ley Lines.
BLM has a history of being heavily punished by movement. With Ley Lines, we are also punished for repositioning. There are a lot of mechanics that simply target ranged dps and force you out of the circle, causing you to lose the buff for 1-2 gcds, not counting time spent moving and not casting. I propose the following solution.
Make Ley Lines apply a buff to you which gives you the 15% Haste effect.
This buff will last 6 seconds, and is refreshed by being in the Ley Lines circle every tick (ideally every second if the game code allows for it).
This way if something forces you out of your circle, you have at least 3 (ideally 6) seconds worth of the buff on you, which should be long enough to move out, cast, and move back in.