Right now the only bomb worth crafting on the nitronome line is the nitronome itself. The other bombs in the series trade off far too much in comparison to ever be considered useful. I'd like to see that change.
Big Angry Bomb:
This bomb should trade off walk speed for more damage, compared to the nitronome. Improve radius and fuse time to match the nitronome. I also think this bomb should get a chance to cause stun, if for no other reason than my own personal amusement at watching stunned monsters slowly plodding after the bomber, who is waddling along as they charge the next bomb.
Irontech Destroyer:
This bomb should trade off radius for more damage, compared to the nitronome. Improve walk speed and fuse time to match the nitronome.
Deconstructor line:
This line should essentially be a pure elemental damage version of the nitronome line, with a bonus against construct. Change the damage type to elemental, add a 5* version in line with the nitronome, and this bomb would be perfect. Adding a chance to shock would be icing on the cake.
I'd go for a bigger radius for the BAB and ID and increase ws for the ID.
I like the elemental deconstructor, but that might make it too powerful with the bonus against construct UV. Shock would definetly be nice.