This is such a lame challenge. Bad enough you can only use fighters, but it absolutely sucks how gunfire can take out bombs midair due to extremely accurate ai and stupid chain reaction explosions
I had an easy time using the 1000 lb bombs on the premium hellcat in the British tree. Very easy to get into and naval ab was easy to pick up 3 kills in a single match. Just my recommendation. Anything in ab with big bombs will do at rank 3 and a fighter icon.