Sadly she'll be limited, no cheap 3000 FS banner for hoarders, only 5000 FS. Up to some point normal girl will probably surpass Ancient Knights' level.

No need to hurry for me because old units like Vervain will become outdated very soon, at least Roman can do damage all by herself, so it's possible to run 2 DPS comp with her and another skill damage DPS, but Vervain, not so much she can do.