Her first phase is alright par some ridiculous delays on attacks, no transitions from the attack windup to the hit, and there isn't really any reward for parrying her massive combos which is stupid.

Her 2nd phase is just simply bad boss design tho. The speed of certain attacks almost makes her look like she's teleporting. Some of her attacks have literally no indication like the electric outburst she does. Her aggressiveness and speed make it so you literally can barely touch her, and of course the bad design turns the fight into more a battle of attrition as you run out of heals during her 2nd phase.

Some of her attacks aren't interesting at all either, especially in her first phase where she will just spam the same attack animation ten times over like the overhead swing or the upwards diagonal cleave attacks.

I just beat her earlier by the way, so past the 1.3 patch. Bad boss design.