As was said before, it's simply not meant to be done solo. The situation to get help may be a bit worse these days, but not impossible, as RAIST pointed out to you, and I think you should take him up on his offer, if that fits your schedule.

Are you guys playing on the same POL account? Because if not, your PLD82 should be able to help her out quite easily with this.

If you care to share your strategy for soloing the Hover Tanks, maybe we can help you out on that as well. Because while it's true that some things weren't meant to be done solo, farming testimony can be done on some jobs, especially RDM.