Help with Cu/Scathatch exhibition quest

I had a somewhat similar setup but I have an Ibaraki as my main damage dealer with MLB White Rose and Rama as my 2nd damage dealer with just the Joint Recital CE, with d'Eon acting as my main tank, with Mash in the back line next to provide defense buffs for my 2 damage dealers. When Scat was about to die, in preparation for the instant death thing that will cast on my front line, I switch Ibaraki with a backline Cu since he can still evade and debuff from it. Finished off the enemy Cu like this after his gimmick effects were over.

From your setup, this is at least an idea that might work. For Mash and Hans give them an NP generating CE like Divine Banquet or similar budget CEs if you don't have it. Alternatively something that will provide star gen like 2030 or similar budget versions that at least provide star gen per turn.

Rama is your hardest hitting Saber and you should use him to bring down Scáthach's HP, so give him the White Rose CE. Use Hans 1st and 3rd skills to up his critical damage potential, and use Rama's Blessing of Martial Arts skill to make his critical hits potent. Have Mash be there to provide extra defense and NP gain for Rama.

Have d'Eon, Cu and Herc on the back line as cleanup. Their evade skills should provide you a little more survivability during the last leg and extra time to finish off both in case Rama wasn't able to take down either of them.

https://www.reddit.com/r/grandorder/comments/97kgdc/nerofest_resources3_turn_minimal_resourcecheesing/

Some F2P help for a few exhibition quests.
I don't have any viable sabers either so i'm stuck looking for supports. Try to find them by refreshing for a couple of minutes/times and then playing a 10 AP quest so that you can attempt to add them as your friends.

Keep in mind that it's not just sabers that can do this job, provided you get lucky with RNG.

For this you need to borrow the strongest mordred, altera or altria with white rose Ce you can find
If you cant cleanse debuffs mordred is better.
Then go wave 3
Buff the hell out off her, use a stun on scatach if you can,use siegfried's np to soften then, chain with mordred's np.
Cu' should die on that turn, scatach will kill everyone exept mordred and won't move.
Use a command seal on mordred and np again.
That should do it

Are your supports under-leveled? If so, you might need to get them up a wee bit. Hans shouldn't really be dying before the third wave. If you've got his 2nd skill fully leveled, and you have a CE with NP gain (NP gain + starting NP is even better), you should be able to use his NP at least once during the first two waves, and then have it ready again by the third wave. That way, everyone should basically be healed up by the time they reach the boss. You can use his 2nd skill as soon as the battle starts, but hold off on the NP, then clear the first wave quickly. Then once the 2nd wave starts, use his NP. His 2nd skill will come off of cooldown in time for the boss if you stall a bit during the 2ns wave (which you'd probably be doing anyway, in order to get everyone's NP ready).

I think I used Jack, Hans, and a borrowed Mordred for my front line. Jack and Mordred both used the White Rose CE, and Hans was using Magical Girl of Sapphire. I just built up the NPs during the first two waves (and I used Hans' NP right before the 3rd wave started, since the NP block would have been a problem). Then Mordred used her cleanse and then fired off her NP to go ahead and take a chunk off of both bosses. Then we focused down Scath and ate the death thing. Jack and Mordred both had Guts from the CE, so they didn't die. Then Jack erased Cu's evasion, and we managed to finish him off next turn. I had a servant in my back line with an ignore invincible CE, just in case a bit of cleanup was needed, but it didn't wind up coming to that.

Rama w mlb white rose hans waver. backline deon mash shiki. Attack shishou for 3 turns and use rama's np to kill cu and whittle down shishou to low. If you cannot kill shishou, focus cu and np to finish him off. The one alive will wipe your team. Use shiki to finish of the last one. You can swap in a tank for the np. Also, level rama and deon to close to max for stats. For supports, make sure they have high level skills, at least 6 or they are not viable. Use hans np before entering boss fight.