Last year I had a prolif on Gunmetal which I put in water until it developed roots then planted in the ground. This year it bloomed! I also had a couple on Best of Friends and loads on Christmas Candles.
This year I have some on a couple of seedlings and so far one on Sungold Candy and Longfield's Beauty. One plant which always produces lots of prolifs is the good old Pink Damask. There is still time for others to form as our season is quite long and I have a number of re-bloom scapes forming.