Agreed with Shieun, go for Mars if fire. You already got Enma for B frame debuff, Mars will bring that to 30% (make sure to use fire resist down first for Enma of Storm Trooper Squads) & you will only need either Ambush on Shingen or Hercules with her axe.
As for wind.. Titania is dang good if you're ready to enter the clicking hell in exchange of using her. If you haven't read it, I explain how wind meta works in #501 in this thread, make sure to read it.
How rude. She herself is not completely useless. Her debuff shield could be well appreciated since dark won't be having any kind of cleansing method nor other option for debuff shield for another 10 months.
Her AW on the other hand is quite useless. At least compared to the cost.