Could you go ahead and make "nuggets" with small squares of glass, fire them, then assemble them into daisies? It’s an extra firing, but you could make a lot of nuggets at a time.
Another thought would be to make a mold and actually cast them…
You might use a technique borrowed from lampworking…I know that you can mark off certain measurements on the rod itself…1/4", etc. However, I think you’ll still have a problem with getting smaller pieces consistent.
Just a thought!