This sounds like a minor issue, but as a Pyromancer who has been staring at this particle for the past 60 levels or so, I think would be a great quality of life upgrade that would take relatively little effort.
The first time I used the Enchant Fire skill, my immediate thought was “This looks like the default fireball particle in Unity3D”. It kind of sticks out against Pyromancer’s other skills and overall just looks… lazy. In general the particle effects in the game look great, so I think this one should be upgraded to fit!