>damage bonus doesn't matter
>ATK doesn't matter, other than Lunar Base DMG Bonus from Ineffa and Flins passive granted by them stacking ATK, which caps at 14%
>highest contributor determines crit or not
>3rd and 4th contributors, supposing they exist, basically don't matter at 1/12th contribution, so their stats aren't very relevant
>1st and 2nd contributors only care about EM and crit
So in Furina/Neuvilette/Lauma/Ineffa, Lauma doesn't contribute at all, sadly. Then I think it'll look between Neuvilette and Furina and see which has the better damage score (who has more EM?) and use that to determine the bulk of the additional damage from the team. The third person doesn't really need to stack EM. So, Furina wants to stack EM in this team to get the most out of Lunar-Charge.