On the F16 Stealth I have a righting pole that extends past the rear beam about 6", I'm 160 lbs, and I have to climb out onto it, staying entirely out of the water, putting all my weight on it, to right it. And it's a 230 lb boat with a light carbon mast, so at 180 lbs and a heavier boat, even with the bag, I'm not hugely suprized that it was tough to bring up.
On the HT I have one of Hobiegary's Solo Rights, but to make it work for me, I slide an additional 24" of aluminum windsurf mast over the outboard end of it, to get sufficient leverage to right the Bimare solo. Maybe you could develop a telescoping righting pole to get the additional length you need, or secure an additional piece of tubing to underside of the tramp somehow, maybe a pocket sewn to it.
I have hyfield levers and 30" shroud extenders on the ARC22, and it recently worked perfectly, with 350 lbs of crew weight popping her back up in less than 5 minutes. The lever releases enough tension to allow the fastpin(secured with a lanyard) to be pulled from the upper end of the lever, releasing the shroud; and the shroud extender(a length of wire rope, the lower endof which is permanently secured to the chainplate, and the upper end is nicro pressed around the shroud above its lower termination) slides down the shroud, catching on the end, and effectively lengthens the shroud by that 30", allowing the hull to fall past vertical before pulling up on the mast, so now the upper hull's weight is assisting in the righting.
I'm pretty sure that the 4 or 5 inches of release that the lever alone provides, would not be enough additional shroud length to be of use. AND for this system to work, the mast base HAS to be pinned to the mast step, or bad things happen. When the boat's back on her feet, one shroud is 30" too long, and the mast can flail about scarily. One needs to quickly get the boat onto the appropiate tack so that the mast is supported by the forestay and non lengthened shroud, and then scramble over to the leeward shroud, reattach it to the hyfield lever, close the lever, and scramble back to the tiller. This seems to me to be the toughest part of the job to do solo, being away from the tiller, on the leeward side, needing the boat to neither power up nor tack back while you're fussing with the shroud. All in conditions strong enough to flip you in the first place.
But we'd all love to hear from you if you want to give it try. It might be possible to bring the tiller extension with you to the leeward shroud, and control the boat's heading. Good luck!
I do wonder about Karl's suggestion about losing the masthead float. With a sealed mast, I can always get the mast tip free of the water, but I often seem to just barely have enough leverage to get the mast past horizontal. It seems the extra 5 lbs at the masthead would make it that much harder. Far from sure though.....

Dave