If you have Molten Belt and Igniters weapons, you can get enough hits on her in between dying so that you can build up enough molten stacks to one shot her when ToS or ToP procs. You have to make a timing adjustment to her purple arrow attack, otherwise the sequence goes like clockwork. For that wider attack, you can drop all the way down to her 6 o'clock position and either carefully time you move back up to avoid being hit by the purple arrows OR circle around behind her until you are back at her 2 o'clock position OR you can run directly under her to the opposite side.

Honestly If your willing to risk it you could put on a full suite from the hazmat zombies cloths and try to establish a. are the main issue, we need the hazmat fibers or the rad pills any way to get this things we dont have a scientist. Then repeat, moving down then up then down then up, until the purple arrows appear. To progress in darkness falls as far as i think you need to travel to the waste land to progress. If you are on her right side, start at her 2 o'clock, then drop down to around her 4 o'clock to avoid the first attack, pause briefly to get her to retarget you new position, then move back up to her 2 o'clock position to avoid the second attack. It is easiest if you can fight her from one side.

Learn how many seconds between attacks, so you can move just before she fires to keep from being hit. Luckily, her attack pattern is very predictable. It is a total dodgeball game for a BH, especially at higher trials.

Defeat elban in eternium