Please, help my butterfly stroke!!!

I have a similar problem except my fall-off point is after 50yds/m. Things I have done in the past include: 1) sets of 50s with first 25 fly, second 25 free, working the dolphin kick off the turn. 2) sets of 50s with first 25 free, second 25 fly, trying to keep the first 25 solid but not race pace, then focus on maintaining good fly form on the 2nd 25. 3) swimming sets of 25 fly (4-20), start out with lots of rest for the first 2-6? (depends on conditioning), then reduce the rest incrementally. When form starts to break down, rest more and repeat when you're ready. 4) swimming lengths of 25s focusing on a relaxed easy glide to help pace longer swims. I don't have the guts to swim a 200 fly yet, but I can swim a nice slow one by gliding through the stroke. 5) swim sets of 25s just dolphin kicking, gradually work up to 50s, 75s then 100s. When I wear out it's usually my legs first, then that results in poor body position, which results in my arms and shoulders wearing out. Training my kick has helped reduce my times in both the 50 and 100 fly events. 6) screwy stuff - while swimming 100s & 200s free every so often I'll swim the last 25 fly to get a feel of swimming it while worn down. I'll push within reason, but do my best to maintain good form. thanks funky. i think it is my kick that is killing me. even with fins, i'm a pretty pathetic fly kicker so that is a great suggestion. working the dolphin kick off of the wall is also something to work on. the pushoff sends me into the red zone where my sole focus becomes taking the next breath. i've never been opposed to muscling but i've critics of the practice say that it teaches you bad form.

I have a similar problem except my fall-off point is after 50yds/m. Things I have done in the past include: 1) sets of 50s with first 25 fly, second 25 free, working the dolphin kick off the turn. 2) sets of 50s with first 25 free, second 25 fly, trying to keep the first 25 solid but not race pace, then focus on maintaining good fly form on the 2nd 25. 3) swimming sets of 25 fly (4-20), start out with lots of rest for the first 2-6? (depends on conditioning), then reduce the rest incrementally. When form starts to break down, rest more and repeat when you're ready. 4) swimming lengths of 25s focusing on a relaxed easy glide to help pace longer swims. I don't have the guts to swim a 200 fly yet, but I can swim a nice slow one by gliding through the stroke. 5) swim sets of 25s just dolphin kicking, gradually work up to 50s, 75s then 100s. When I wear out it's usually my legs first, then that results in poor body position, which results in my arms and shoulders wearing out. Training my kick has helped reduce my times in both the 50 and 100 fly events. 6) screwy stuff - while swimming 100s & 200s free every so often I'll swim the last 25 fly to get a feel of swimming it while worn down. I'll push within reason, but do my best to maintain good form. thanks funky. i think it is my kick that is killing me. even with fins, i'm a pretty pathetic fly kicker so that is a great suggestion. working the dolphin kick off of the wall is also something to work on. the pushoff sends me into the red zone where my sole focus becomes taking the next breath. i've never been opposed to muscling but i've critics of the practice say that it teaches you bad form.