Need some help ideas for story Maven

I'm honestly not sure how I'm going to get the Maven's voidstone with my character by myself this time. My character deals enough damage, but I just don't see how I'm going to get near the boss in the final phase consistently. Normally I just... shoot her? and hope she dies before the simon says part gets too complex.

Any ideas? I'm hoping I'm just tired and overlooking something completely obvious. I still have the last ascendancy to do, so there's plenty of time, but I'm not seeing an answer here.

You need insane dps to skip memory games, so there'll be at least three. However, there's one thing i haven't seen in guides - if you touch the beams during last phase memory game, don't panic. Complete memory game as usual, then carefully run around for the remaining debuff time.