here's how to get to the mission: http://www.gamefaqs.com/console/xbox360/file/944262/58302
note: to obtain the Kiku blade weapon which does stupid amounts of damage, complete mission 24. Defeat Red Rum & Starka on normal.
M34: Defeat ORCA's Special AF Unit
Normal: AF Jet x 4
Equip dual KIKU blades and nothing else, or the best blade you have. This is pretty easy, just Kiku each Jet in turn and avoid the lasers they fire. With KIKU, you usually won't have to worry about the blades, the Jets will die too quickly. Just for clarification, you won't have to bother with the radiation ports, just KIKU them each anywhere on the body.