Emerald Earrings are all-round acc to performers, no brainer. I really like the Melody Strike buff, don't care about Arrow Vulcan neither use it.
Word is Elemental Towel + Fire/Water/Earth/Wind bow SR bonus is bugged. But don't worry, Bow of Storms is the best for SR because of the cooldown reduction and FAW EA Menblatt is the way to go.
Eleven/Crimson bows are not bad, but the cooldown reduction of Bow of Storms is still better.
About armors, Elemental Tights is good but overupgraded Evil Dragon Armor leeches HP/SP. Choose whatever you need.
Most importantly, bio5 hats/cards are going to buff performers a lot. Take a look! Test in Sakray!