1948 tips. Do as Xenon said - fly the gas plane in a straight line, letting the other plane weave in an S fashion IN FRONT OF THE GAS. Your planes WILL get damaged if you stay in the gas. Once the 3 faster planes are dead, make a large u-turn (don't worry, the fat plane won't be near) and split up, one going to the top, one to the bottom. Wait and see which one the flying wing follows, and use that one as bait. The other plane is going to be your attacking plane. Just follow the Wing as it tries to follow your bait, and it should be dead in no time.
"Sir, what should we make the armour for the drones out of?"
"COINS. AND MAKE THEM LIKE.. EASILY DROPPED. AND WHEN EXPOSED TO OXYGEN, THEY'LL DECREASE IN VALUE AND GET SMALLER. ESPECIALLY THE BOSS."
"Can't we just-"
"NO!"
This game reminds me of a game I've played ages ago... I loved that game. There were slimes and magical books; RPG games. One of the better RPGs I've played, although it DOES need a "Fast Forward" button for text, and maybe an autosave would be nice. Thanks.
 "Chrono Days Sim Date"){kind=icon}
 "Fantasy Offline"){kind=icon}
 "SteamBirds"){kind=icon}
 "Icy Gifts"){kind=icon}
 "Flagstaff: Chapter One"){kind=icon}
 "The Legend of the Golden Robot"){kind=icon}
 "Upgrade Complete 2"){kind=icon}
 "Sushi Cat 2"){kind=icon}
 "Hands of War 2"){kind=icon}
 "The Last Stand 2"){kind=icon}
 "Platform Journey"){kind=icon}
 "K.O.L.M."){kind=icon}
 "Arkandian Crusade"){kind=icon}
 "TinyRPG"){kind=icon}
 "Castaway"){kind=icon}
 "Particles"){kind=icon}
 "The Unfair Platformer"){kind=icon}
 "endeavor"){kind=icon}