I finally found a good recipe. One that really works - consistently works. An Italian meringue base (egg whites whisked until bubbly, then add soft ball stage sugar water slowly down into the egg whites while whisking) adds stability. Cook in a convection oven (low around 160C), cook until you can pick up the macaroons freely off the sheet pans.
Small things make all the difference! Macaroons are so fickle it's awfully nice to find a reliable recipe!