Mooring pennant bridle

[Cat Nap]

An unfortunate incident happened at the YC a few weeks ago.
Our mooring pendants are 5/8 in nylon. The cleats on his boat were to small for this line. He made a bridle by passing a 1/2 in nylon from one cleat through the pennant eye and then back to the other bow cleat. Everything was fine until we had sustained winds of bet 20 and 30 mph steadily for a day and a half. The result was that the smaller line was chafed through by the heavier pennant and the boat ended up on the beach. There was no apparent damage to the mooring pennant eye.
The question is when we make a new bridle should the smaller line be attached to the pennant eye with a Prusik knot to eliminate slip and chafe or would some other knot be more appropriate ???
Thanks for your help. Nick