Granblue Fantasy グラブル – Dark Ultima Spear Team 闇オメガバルーチャ編成 − アフィリエイト動画まとめ
Using only Ultima Spear as source of DA/TA wasn't really a good idea in this context because all the characters lacked a way to bring DA/TA. I should've either used Double Trouble on MC, a cerb gun in the grid or Hermanubis as main hand.
The team anyway works pretty well in an Hades Stamina team. The main hand I'm using is from the 000 event and it brings a 10% stamina modifier (same as Fallen Sword) that isn't boosted by Hades. Not great, but still a fairly decent main hand compared to the other free alternatives.