just to make sure we are all on the same tactical page here, any one of those mooks could one shot us. Grey Champion's weapon has spell boost so lets start a riot is a multiplier of somewhere between 1 and 9002. so we might want to take extra steps to avoid being hit by any of them. like taking advantage of them all being melee only.
Grey Champion is high grade bullshit.
Here are what her spells look like with the Spell Boost from
!☆Riot☆! :
Lets Start A Riot!
Level 20
Base Damage: Target's Damage + 9,000
Magic Modifier: 2 + 1,200 = 1,202
Affinity: Song | Battle
Ability: Boost-All | Boost-By-Modifier
Blast ☆ Star!
Level 25
Base Damage: 12,500 + 9,000 = 21,500
Magic Modifier: 1,200
Affinity: Song | Battle | Legend
Ability: Omni-Magic | Collateral Damage
If I'm interpreting it right the boosted
Lets Start A Riot! brings the Spawn of Chaos' base attack up to [9,666 x 1d1202] which on average will come out to around 5,809,266 which is easily enough to one shot even Nepgear. This isn't factoring in that Spawn of Chaos have
Coming of the End which
triples the effectiveness of their weapon. So odds are that damage is more like 17,427,798.
Skeletal Assault Knights meanwhile have a base damage of 400 so they become [9,400 x 1d1202] for an average of 5,654,100. They are actually even worse then Spawn of Chaos' because their weapon has Double Hit and they have the ability
Death Seekers which deals double damage against living targets so they'll actually be hitting for 22,616,400 damage.
Oh and as for Grey Champion despite being "weaker" in solo combat her spell
Blast ☆ Star! hits for [21,500 + 1d1200] x 5 thanks to Omni-Magic. Which means her opening attack deals 110,500 damage and thanks to
!☆Riot☆! having Omni-Caster (Level 2) she can throw that out twice per turn.