I've tried Flightline with the cover stripped off the section from above the mast cleat to the sail head. Stuff is very light and grippy, and more importantly loose part on tramp does not like to hockle up during hoists/douses. Have not been able to find it is 3/16 yet, which would be ideal.
Probably should not be letting this tip out to this site as Dan D. here surely doesn't need any help beating me more than he does already, but we've been using some super-duper glove technology that grips like nothing else. I'm seriously thinking of using only 1/8 dyneema core for the entire halyard/douse line because of these gloves. To find these gloves, just stop by your HomeDepot or similar on the drive home from work and find the large box of cotton gardening gloves with the palms dipped in (usually) blue latex. They smell like rubber bands and this will stay on your hands for a day after using. They are pretty much shot after a 3-4 races, but at $8 for a pack of 3 pairs, why not buy a whole mega box load! Can be worn over standard Ronstan gloves for even better performance/comfort.
P.S., they are also available in pink for the ladies (Dan's crewmate ;-)
Mike.