200 splitting

This past weekend we had our LCM zone championships and I really wanted to work on my 100 and 200 splitting. For my 100 I went out strong and relaxed and saved my legs for the last 50. The funny thing is that the first 50 I felt really fatigued (swam the 400 and the 50 fly less than 2 hours prior). Still, I came up with a time I was happy about. A masters best to date. 59.31 splits 28.77, 30.54 diff. 1.77. For the 200, it seems like most good 200 swimmers take the first 100 about 4 seconds slower than their fastest 100 and nearly split the same coming back. So I tried that with the following results. 2:15.02 1:04.62, 1:10.4 diff. 5.78 My swimming experience is limited prior to becoming a masters swimmer and my long course experience is nil. So My guess is that my 100 splitting was as good as I can expect. Take the dive out and I split it fairly even. But my 200 split sucked eggs (nearly a 6 sec. difference). How can I improve this? I want to try and go a sub 2:10. Is that a realistic goal? And how do I get there? Kevin