That's the thing though: that little Joan with some help may allow you to clear Andromalius. For example you can have Snow Raph and SSR Nike. Herc with PF may or may not be enough to kill Andromalius fast, but with Triton and SSR Nike on board you can stall quite a long time (get combo rate down as extra and Andro is not that dangerous aside from overdrive. Just as I've said: for most people stunning Andro before overdrive is the easiest strategy, but for some Joan with flag may actually allow doing AQ5 at all.
You couldn't be more wrong, most of them are there since beginning. Let me introduce you: Gandharva, Surtr, Aji-Dahaka, Minotaur, Succubus, Siren, Naga, Wood Nymph, Dryad, Gremlin, Slime (I may have forgotten about someone, sorry about that).