You can't set off burning field because the prankster illumise is using rain dance which stops that effect, have your mienfoo fake out illumise on turn 1 to stop the rain dance and growlithe can set up the flame burst. Not sure if that growlithe can actually survive the masquerain's 1st bubblebeam. If it can't, then have your graveler 1st instead of growlithe and use rock throw to probably ko both of them. Without rain dance, Anorith won't have his swift swim doubling his speed and aqua jet won't get boosted so he should be easier to deal with. The only other pokemon that can stop the burning field is her araquianid with rain dance but it is pretty slow. If araquinid is the 1st pokemon sent out after illuminise or illumise doesn't die to rock throw, then what you can do is level your monferno to lv 36, evolve it, have it learn fire pledge from the move tutor in the building next to the gym, and then use a common candy on it. Your infernape which is faster than than masquerain can then set up fire pledge at the start of the battle to set up burning field after your mienfoo fakes out illumise .