Rocna anchor on all rope rode, 2:1 scope.
Really? That's a hell of a lot of rode to put out. We use a 1:1 scope on our Rocna and it works great. However we use all-chain.
But.... the folks who share our finger and who have a 40' sailboat they've taken all over the southwestern Pacific have recently discovered another advantage of using a Rocna. They have the same model we do, and they have found that they need no rode at all.
They've discovered, initially by accident. that if you simply drop a Rocna onto the bottom with a light retrieval line attached to it and a crab trap float on the other end, the boat will simply hover over it with no connection to the anchor whatsoever.
Even in 40 knots winds and 3-4 foot waves, they found that their sailboat stays directly over the Rocna at all times. Then when they're ready to leave, they simply pick up the float with a boathook, haul the Rocna up and set it on deck, and they're on their way.
We have to fix a leak in our Livingston shore boat before we can go out again, but when we head out again in a week or two, we're going to try this technique. It sounds brilliant and eliminates the need to carry an anchor rode at all.
I'm told this will ONLY work with a New Zealand or Vancouver-made Rocna. The newer China-made Rocnas apparently lack the rodeless holding power of the originals.