Random ideas that are somewhat janky.

Underground Arachnid is really good. All the LV 4 Insects suck though. We need Armored Bee.
Armored Bee + Dark Simorgh + D-Hero engine + Underground Arachnid.

The Elemental Hero Fusions work with GB's.
Prisma + Miracle Fusion + GB line-up + AZ/Great Tornado/Gaia.