Strategy For Qira Hive Air Level 9? (stormy Knights)

Okay these guys are annoying. Me and my friend are doing the Qira hive and so far we haven't had too much trouble getting by (Even first area boss was easy) Then we get to these guys and they have an annoying flamethrower attack which not only does a lot of damage but follows you when you try to run away keeping you from just circling them. We are aware of their weaknesses just unaware of how to not get murdered by their flamethrower

 

Use knock back spells, be aware of when they are charging

 

Run faster.

 

Play assassin, smoke bomb, spin attack, rinse, repeat