Warning: Do not be fooled this is not SS/S tier! She is in the same tier as Viktoria. Her AP consumption is waaay too high so it will be extremely difficult to use her abilities quickly unless you have Jiza's TMR...
Save your visiores, she is A tier unit - same as Viktoria!
You can sub ninja for low ap consumption, at lv.79 max ifrit affinity she has 25 initial AP for shuriken x2. Monk if you want more dmg. and you can chain her ulti with Vinera and WoL or another 3 hit ulti for more bonus chain dmg
Of course she's S tier, she has 25% slash resist and most slasher unit has weakness against piercing, just try to use Golden armor and siren on her, slasher unit can't do anything.
Her javalin throw seems just a better version of nighthawk in every way, and for only 14 AP. Wonder if she can one shot many people with it. If so she is simply broken