I use my Koyan and Oberon as support, then just borrow Ibuki/Melusine for 3Ting it, I do need to avoid using buster cards not to kill Koyan too soon lol
Read the "that can farm" part. I don't have Barghest and Melusine, my Habetrot still sucks, I don't have Skadi, Koyans, and Oberon, and also the only quick support servant I have (excluding Alexander) is just Nyalter and Wu Zetian. You can say this is not ideal 😉
I tested the level 55 Mélusine against Beast IV, in the Raid, it left me impressed, it managed to cause enormous damage, but it is equipped with the CE of the event.