The biggest issue with Dragonfires is probably the ammo count. However, with a dedicated build, i.e. Missile Specialization and Expanded Missile racks, they have enough for more most anti-armor/hull uses.
The individual munitions are pretty good, other than the delayed effect which means they hit dead ships more often than other guided missiles, but hit targets more often than AI launched Reapers could, since they pass around allied ships.
I suppose you could do a test comparison between 10 Gryphons taking out an Ordo with Dragon fires vs Reapers.
Here's an example with the Dragon fires on Gryphons vs an Ordo: