For Flame Troopers it's maybe a good idea. Check Out BF1 Flame Trooper:
(Skip to 1:42 and don't look at the title )
But in BF1 Flamers have those huge tanks that catches fire when it gets shot. We don't have that in RenX since everything is built in the weapon itself. If Flamers had these tanks it would be nice.
In the final stages of the Ren Beta Flamers HAD these tanks but got removed before it's first release. Only Mendoza in Ren has the tank but in RenX not.
Chem Troopers had these tanks aswell in the Ren Beta and got also removed before it's first release.
I think if Flamer, Chem or Doza had one, it would be nice but think it doesn't really fits without these huge tanks on their back. And I don't see anyone editing the current character models.
Maybe with my upcoming game artist I can do that but I'm not sure yet since I have no clue where I'm startin' with.