The spell Arcane Blast is essentially custom-made for Jaina. When equipped by Jaina, it creates a synergy where the combined effect is greater than the sum of its parts. When paired with Unbound, this strategy offers potent area-of-effect (AoE) clear and long-range tower pressuring capabilities. It’s also a suitable approach for tackling many hard-to-push bosses, though it may reduce the carrying capacity of advancing units. 

This build requires units with high single-target damage, such as Gargoyles or various high-cost ground tanks. In short, after equipping Arcane Blast in the Spell slot for this strategy, the second Alliance slot can host the Worgen, useful for securing distant treasures, eliminating individual enemies weakened by AoE, assisting in tower pressure and battling bosses. The final 2 slots can be selected from Tank, Elemental, and Unbound categories, where a combination of Gnoll Brute and Blackrock Pyromancer can be utilized.