Nothing now it's been two years but even back then it's about 4 minutes a kill, shortbow with chiv, bushido and max di swinging at cap. You wait until she is out of mana from the wraith form leeching THEN use the hiryu, also standing on the hiyru prevents the spawned mobs targeting the archer which is a nice bonus. Everytime you hit her every 1.25 seconds after she goes out of mana you leech her mana, she does not generate more than 15 mana ever second so never gets enough to wither or poison strike. It's conceivable you could get string of misses and she could get to enough mana to wither but only once, i have never seen this happen with 40 HLD and lightning strike while discorded.
The other bonus of this is when she is low she can't cast greater heals and you can switch to a complete luck suit at >1k health and the pets will kill her alone as she can't heal.