I play in Asia region so yeah it does open up a bit earlier for us. My score only puts me at 2% atm (Although only 10k entries so far). Cant seem to push any higher sadly.
Dark Breath is pretty good tbh. You should keep him and use with Ranran when needed (AoE heavy stages etc).
What mode are you in now? Is Murit part of your team ATM? Personally, i wouldn't do it if he's in my active team.
IMO AoE is king for this WB since you are hitting multiple head at the same time to wrack up points. At the same time, you also need good single target DPS. You don't need a tank so i would sub out Patta. Who is your team's healer btw.
I would prob sub in Rar (i've never seen him in action though) because he has that extra 27% boss damage passive.
Was thinking of that team for the first one since it's single target. This second one seems to have multiple heads so I'll prob use my AoE mage. My main healer is Porin but I subbed her out on the 1st one since no on seemed to be taking a lot of damage. Is she needed for the 2nd one?