Argh, I accidentally pressed the recc button again instead of reply e.e The other game I'm playing has the Recommend button first then Reply >.>
Anyway, if you're going for auto-divebombing, try to approach from low altitudes to screw up their AA. Variate your altitudes all the time. When you spot your desired target, HOLD L-KEY WHILE RAPIDLY RIGHT CLICKING on the target. This should allow you to bomb from medium altitudes. Don't try this with very low altitudes, the run will fail.
Further, if you intend to bomb from the SIDE of the ship, spam right click faster. It causes the bombs to drop earlier which would increase the chance of you hitting the target from the side.
If you intend to go manual, then go for it. Manual DB is way better than Auto DB, unlike TB. Besides, with some techniques, manual DB runs are virtually undodgable.