Fun fact: while testing things on-element just so that I wouldn't need to pull out a calculator for all the damage numbers, I found out that my garbage Light team (with full slvl20 Grid, 114% Assault when calculating 2x SSR Prides as 0% base, using Managarm)... can't handle Wave3. We're talking PF Full Burst (couldn't even reach Rage before this, since team relies so heavily on Herc's burst effect for Def Down), getting wiped, Elixir, Full Burst (CDs not lining up for another PF in time) and still not enough, second wipe. AQ5 damage requirement is no joke, and is the first content that I find you simply cannot clear just because of an okay Grid. While it is outdated by modern Light standards (the only difference from this video is that Forseti was replaced by Light Amaterasu to allow PF), all it's really lacking is base Atk (and 10% Elemental from slvl10 Axe) and tons of HP. And no amount of HP will save you there.
It wasn't far off though, and if I had Frey leveled up she could've easily handled it. Hell, she could probably solo the goddamn Rage bar...
So yeah, just because you buy a few turns with Joan, what exactly are you going to accomplish?
And, it's not like I ever said it's impossible to tank it. I did say that "but can be doable for those lucky enough with specific Hime"
But luck of the draw - such as pulling someone like Poseidon who lets you tank Wave3 with Joan (Fire only) or Frey who can murder the Rage bar - is not reliable.
While it is also not reliable that you have one element that can do any AQ5, it's far more likely that players can be expected to have at least one such team. Either because they rerolled into a P2W Eidolon, and/or because they've pulled/MT'd some ridiculous hard carries like Uriel, who can probably solo even Water AQ5 Rage bar.What are these? I don't know about them, but those aren't here today and won't be for the next seven months or so, I'd guess?