The main problem with that approach is that there are a lot of "heavy defense" categories (fortresses, force fields, and other more esoteric ships) that bombers are particularly good against. If you hover over those units (such as force fields), it tells you in the explanation text that it is best to attack them with bombers, and it even gives you an estimate of how many you are likely to need.
Since there are so many things that bombers are particularly good against, I put the explanation on the hovertip of the targets, rather than the bombers themselves (so that when someone goes "oh man, what's this new thing," they know right away if bombers are particularly good against them or not. Let me know what you think...