I've raced mine with #3 only rating for some double handed races
As long as the air is up its OK but if you get under 10 knots of breeze the boat becomes a dog no fun to sail and NOT to the PHRF rating
I guess if were to optimize the PHRF rating it would be to a 155 genoa(which is now PHRF baseline) on a roller furling system to pick up the this would be good up to 15 true wind speed but then how do you change down to the blade?
The full hoist on the Jib only added sail area up high ie more tipping action so I don't think that would help overall
Now for PHRF a 1/2 oz chute makes a lot of sense but you will only be able to carry it to about 10 knots apparent which means a 3/4 oz chute is still required
