The trident should have the spear's kinetic_weapon component.

The trident should have the charge attack that the spear does. It's actually already possible with commands, and the two attacks don't conflict at all: Holding right click uses the charge attack, and releasing right click throws it. The trident should be a jack of all trades. Riptide is a better but more situational lunge, and it's the same with channeling for flame. Giving it the spear's charge attack would give it another layer to its use as a multitool. Maybe it could be limited to when swimming, which would give dolphin's grace another use.