You’re kind of contradicting yourself here. You say that the problem is not that Pyro can’t get sufficient damage, but that he only has two viable loadouts at his disposal.
If these two loadouts alone can get him sufficient damage, I don’t really see the point in adding another one, especially to a weapon that hardly anyone, in FF2 or not, uses anymore in favor of better melees such as the Powerjack and Volcano Fragment.
Also stock is still viable despite how people get about airblasting Pyros, especially for bosses like Doom who don’t have rages that are extremely detrimental to the team.