Ok here's my $0.02 on the whole competing thing. Yes show a level below what you are schooling, and I don't mean schooling by you're missing one movement in the test, I mean schooling by kind of starting the stuff. At the lower levels you have to push a little bit. I showed 2nd level before my horse was really "down pat" in the collection and still managed to win stuff. Showed third level with occasional bucking in the changes, still managed to win stuff. Where being absolutely 100% confirmed in your work starts to matter is in FEI - before that, stumble through and the judges are far more forgiving. If we all were to sit around until we aced everything in a test - well there wouldn't be anyone riding above first level. That kind of perfectionist view is great at PSG and above because it is how you get the really good scores, and a GP well that's as high as you can go so perfectionist away all you want. But it gets really boring, really fast. Always try new things, dont be afraid to ride something because it's 2-3 levels above what you are showing. My horse had pirouettes before he had changes and we were riding 2nd level at the shows. All horses progress differently and just because it's not in the test doesn't mean dont school it. And just because you don't have something in the test, dont be afraid to go show it! IMO a horse is in the same environment whether they are doing training level or GP so why would you ride lower than what you can? The results of a little "push and shove" may surprise some.
As far as OP expecting 70% in intro at recognized shows - good luck but I think you're raising the bar far too high.
They say money doesn't buy happiness -- well happiness doesn't buy horses!