Yeah, it's pointless, but fun. Things explode, be happy! Nothing really new required. Fireworks can be crafted from the Alchemy menu. All fireworks use regular mage and necro regs. You can make Sparklers, Fountains, and Rockets. There are 8 Small Sparklers, 8 Larger Sparklers, 8 Rockets and 8 Fountains.
Various Mage and Necro Regs
Minimum 42 Alchemy Skill