She already seems to be able to outrun and outmaneuver the fighters, and her shield, while taxed to dangerous level in the process, did successfully tank the shimmer-blast. Her problem is that she can't run away and hide, she'll be found before she can rest because she can't leave the planet. And it seems doubtful that she can pump up the power on the beam enough to break through that distortion shield. What she needs, is find a way to destroy the enemies other than brute force, or somehow fake her demise so the mega-nega-squidward and the alien ship stop searching for her.
Judging by the size of that ship, the first option is more or less out of the question. But we do know she can do a thing. It's just a matter of whether she can do it in a sane and sufficiently safe manner.