Challenge (Golfers): Since they only have to kill you 4 times, the strategy I found best was to go Commando w/ Bouncing Betties. The stage being a tiny helicopter, if they swarm it then you are pretty much done since its one and done mostly with their attacks. The key is to keep an edge and aim for heads to deal damage but as soon as it seems they have an advantage, to jump off and suicide. This will allow you to slowly build your total while keeping their total stabilized. Eventually you may score some Kill Streaks and lay the Betties on the side you plan to protect. As more Betties pop out you get yourself some breathing room since AI tends to avoid those. With this strategy I was able to beat it without officially losing a life from the AI.