Halberd Cannon can happen in 3 zones, but the amount of resource required will be immense, since the lack of zones means you'll need to have one of the materials be dead first to free up a zone, bring out the other material, then revive the dead material.
Super Easy to make in 3 zones you just need to go for Blade Blaster and then go for recipro dragonfly, after that recipros eff and then u have a halberd cannon, just like in the show