Strategy for 200 FR

I've never raced a 200, or even a 100 FR; my 50 FR SCY is 26.8. I'm in a USA meet Sept 20th - expecting to get trounced by kids half my age, but still I want to put in a good showing. How should I race? What should my 50 pace be? How do I not die on the last 50? etc... I'm 44, male, swimming masters only 2 years, still learning lots, and open to all feedback - thanks!