Online Ground Target Help

[Coopfrog]

I could use a few tips attacking targets in the online stike mode. I am currently am not having much luck destroying targets. I can go in and damage the other team for 7-15 points per attack run but I can't seem to destroy the targets. I do not have access to the b-17 yet but I do have a avardo and the 1000lb bombs that can be equipped and these still seem not to do alot. Any help/tips would be welcome