My understanding (and I'm new at the blob thing) is that you fish them on any line you like.
Put them on a floater, grease them up and let them sit there or strip them back. Don't grease them and let them drop through the water slowly or strip them back. Put them on the point with a could of more imitative flies like buzzers, DB, crunchers and snatchers, AKA a washing line, the blob will help you to hold the other flies in the top few inches. Put it on the top dropper and hand the cast off it it you want to get a bit deeper.
Put them on a midge tip, again try a washing line or 2 blobs and pull them back or Fig 8 them. Repeat with heavier lines until you find the fish.
I'm sure there's a load of other things some of the fishing gurus. The blob seems to be a bit of a Swiss Army knife of a fly.
Cheers
Andy
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Caught it on a Big Green Hairy Thing!
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