I plan to play a Bomber (a Rogue who uses bombs instead of sneak attacks and has access to Alchemist discoveries that upgrade bombs) and by level 6 I plan to get Breath Weapon Bomb to turn regular bombs into breath weapon attacks in a cone.
Then I saw some feats that improve breath weapons, like this one. And I wonder if the Breath Weapon Bomb discovery is enough to qualify for this feat. If so, the Strafe Bomb discovery would likely become obsolete…
Best Answer
The only requirement for Shape Breath Weapon is "Breath weapon as a special attack." 'Special Attack' isn't well defined for non-npcs, however 'natural' breath weapons (from a dragon, gorgon, etc.) use the Universal Monster Rules 'Breath Weapon' entry, which specifies that they are supernatural abilities. The Bomber class says that it uses the Bomb class feature of the alchemist, which is also a supernatural ability.
Since both of these abilties are the same type, and that Breath Weapon Bomb specifies that it is being used as a breath weapon, I'd conclude that it is sufficient to satisfy the requirements of Shape Breathe Weapon.