Hi leiby,
My guess is that you probably have more offshore experience at this point than most of the users in this part of the forum, myself included, although there are no doubt some here who have a lifetime of offshore experience under their belts.
Since they haven't piped up yet, I'll volunteer my take on the subject. I am a little ambivelant on the subject of taking my Lancer offshore, or at least on an extended offshore cruise. I haven't done so yet, more due to time constraints than anything else, but am planning a circumnavigation of Vancouver Island at the end of next summer, when the weather is typically pretty favorable. I feel quite confident with the boat for that particular trip at that time of the year, but I'll be doing a ton of little mods ahead of time.
My ambivalence around longer offshore trips is the fact that it is a deck-stepped mast, and the rigging isn't super heavy compared to some others. I had a long chat on the subject with a friend who's had his boat (not a Lancer) back and forth to Hawaii 5 times, and won most of the ocean races in my part of the Pacific Northwest. While I am by no means whatsoever an 'offshore veteran', my friend is. He owned a company that built around 120 cruising sailboats, and has something like 80 000 NM under his current keel.
His recommendation was to ensure that the compression post is in excellent condition and replace it if necessary, and to consider upgrading the gauge of the shrouds or converting to stainless rod rigging to ensure maximum rig strength.
Another recommendation is to look at some of the safety regs for big offshore races such as the Transpac or Vic-Maui. These will stipulate all sorts of little mods that will keep you from having your skull cracked open by a flying tin of beans or icebox lid. They also stipulate things like having your lifelines (what a misnomer!) made of uncoated cable so that you can detect impending failures, minimum gauge and material for jacklines, and so on.
You've probably already added a backstay tensioner, and if not, that would be on my list of things to do. Aside from that, the 36' hull was designed to race in the Transpac, and is meant as an offshore design, although the interior would benefit from some tinkering to make it more projectile-proof and offshore-friendly, such as additional strong points for handholds.
The Lancer does have a fairly high volume cockpit, and that is another source of my ambivalence about taking her offshore in truly heavy conditions. In the event that one were pooped by a wave breaking astern, there'd be an awful lot of weight in the cockpit until it drained. I'd also look at something a little more wave-proof than my lovely cockpit barn-doors.
That said, there are plenty of boats out there that aren't necessarily better built that people take offshore. I think I'd have a pretty long list of upgrades in mind before taking my Lancer down the Pacific Coast to Mexico, or to Hawaii, though. Mind you, those upgrades might cost a whole lot less than upgrading to a heavier vessel, and might mean that you get out there a lot sooner on the sweet Devil with whom you are already so well acquainted.
I haven't yet had my Lancer out in the severity of conditions that I've been exposed to on previous boats, but her performance in the bits of rough-ish weather I've had her in have been reassuring. So far, the most I've seen on this boat is maybe a wee tad over 25 knots of wind, (fairly cold air, so more dense and therefore forceful than the same windspeed in hot weather) but nothing really challenging. Nonetheless, I didn't see any bad habits popping up, even with the full main and 135% Genoa up in approx. 20 Kts. When the wind piped up to around 25kts or so, I threw a single reef into the main, and cheated by furling in a wee bit of the Genoa (I know, it distorts the sail shape, but I had skittish novices aboard and they are uncomfortable with heel) Besides, we all know that at more than 18 degrees of heel most boats start losing efficiency and stressing the rig...
When we encountered wind over current at a river delta, she handled the steep, tall, stacked and chaotic chop quite well, if with somewhat lively fore and aft pitch. Still, a fairly dry ride, for all that
The ideal offshore boat might have a little less beam/length, but others would say that the ideal boat is the one you own and can afford to go sailing in sooner rather than later. I hope this gets a discussion going that is helpful!
Cheers!
Jeremy