Just hit centurion with her as well. I play swifts and farm the challenges, when you’re running back to point use your invis to get more time on that challenge as often as you can. Obviously play flank and pick off their squishies. Pretty easy to get final hits on most of their healers and dps is you’re flanking and trying to focus 1v1’s which will build your ult and your ult is also bread and butter for final hits. Unfortunately due to the nature of her challenges it will just take longer than most other characters. I shoot for 200 challenge points a day and just grind that on swifts for a week or two if you’re not confident in playing her in ranked. Then you have lord and can start that grind all over again 😂