I am intrigued by the reply to the original question!
Basically I have gone in completely the opposite direction to the old master (Altmeister) and it is difficult for me to glean much input that relates to my set-up from his reply.
I sail without amas on an AI hull with an adaptor to accept the small hobie mast. I have upgraded my mast to a carbon fibre one so that it is stiffer and doesn't deform anything like as much in stronger winds. With this kit I will never keep up with an AI (except in the lightest of breezes when nobody is going anywhere fast) because you simply can't load up the sail like you can on a trimaran without risking a capsize. I can fly a 1.8m2 jib to increase sail area in light winds but I rarely do that these days (for simplicity's sake). I use a boom batten to reduce bellying/collapsing and resultant rolling on a dead downwind course.
I would be very interested to know how the Star sail is likely to compare with the standard Hobie sail on my set-up. Clearly a larger sail will work better in lighter winds but if the Star and Hobie were the same size would there be any noticeable advantage/difference in performance of one over the other - in other words is the star sail intrinsically a better-designed, cut, constructed, cloth sail or just a sail with more area, a different shape (and a boom?)...?
Ok - the 3.4 doesnt have a boom - only the storm sail does.
The 3.4 obviously gets more wind on low wind days - yet is less tippy on high wind days due to the mast flexing.
I dont understand why you would stiffen your mast as wind strong enough to put you in the drink will do that better with a stiff mast.
Its hard to say - esp taking into account your hull speed is a bit faster than mine