OK, a bit of a follow-up...
I almost never give in and search the internet for hints on video games, but I tried this time... and discovered that it looks like not many people have gotten past it anyway, lol. I have SOME idea of what to do now, but only based on random people from message boards.
It's a bit challenging for me, because I've taken a party in that does not contain ANY of the bigwig laguz... they're too cheap, and I've brought up so many other people so lovingly, I don't want to just deposit them here at the end. My group looks like this going into the final battle:
Micaiah: Level 19 Light Priestess
Useless against the final boss itself, but absolutely essential for basically every battle leading up to it. With her maxed out Mag, Luck, AND Res, and 50 HP, she can take more shit than you might expect from a mage; her 32 Speed is a big improvement from what she used to be like, too.
Ike: Level 20 Vanguard
Well, I have no choice in the matter here. Ike is a dangerous person to "have" to bring along, because his 16 Resistance is utterly horrifying- the worst in my group. Add to that the fact that he has abysmal Hit against the final boss, and he is often, sadly, a liability. Never did I think that godly Ike would be insufficient... but here, he's borderline.
Haar: Level 20 Dragonlord
Another low Res tank, but with higher attack power and defense than Ike. Haar's main problem is that he's just too slow- while he can heavily damage the final boss, he will die if he doesn't get the kill, because she gets to attack twice against him.
Mia: Level 16 Trueblade
Mia is a saviour. She is so fast that she's able to attack twice against the boss, and strong enough that she can do significant damage as well. She lacks HP, but at least she can hit the damn bitch. Mia is key to this battle.
Marcia: Level 16 Seraph Knight
Marcia, together with Mia, make the dynamic duo that can work to take the final boss down most of the way. Like Mia, she's fast enough to get two hits in, and with the Wishblade, she can do decent damage as well. Her Canto ability ALSO lets someone else come in and attack at close range. Without Marcia, things here would be impossible.
Meg: Level 20 Marshall
Meg is a wonderful unit. She took a bit of work to bring up at the start, but the effort has been worth it. She's my only unit with 30+ Defense AND Resistance, and thus, thanks also to her maxed-out Speed, she is my only unit that is able to take two attacks from the final boss without dying. She is ALSO my only unit that has excellent Hit% against the final boss: 91 or 100, depending on if support unit Ilyana is around. So, while her attack power is only 11-16, she is a solid unit who can stand up against any enemy instead of shrinking back.
Ilyana: Level 11 Arch Sage
Ilyana, Ilyana. Some days I love you, and some days I don't. Her low defense, speed, and HP make her a sitting duck for the final boss's targeted attacks- it is very difficult to live very long with her. However, with her custom-made tome, she has very exceptional Hit, and is very good at playing the dual-role of backup healer if need be. Against the final boss herself directly, though- it would be an unfortunate loss of life waiting to happen.
Sanaki: Level 11 Empress
Sanaki would be amazing if it weren't for her horrifyingly low HP. I'm always taking care of her, it seems, to try and prevent an untimely demise. She is, however, stunningly useful against the barriers- like Ilyana- and with her item that she gets going into the final battle, she can at least withstand most things that the final boss throws at her from afar. Up close, though? She can do 4 damage, but she comes within a hair's breadth of saying hi to the next world...
Rhys: Level 11 Saint
Rhys is interesting. He's not strong enough to attack most anything, especially on this final map, but without him, I wouldn't be able to use my Fortify Staff (with its remaining two charges) or Matrona Staff (fully charged). Man, I wish I had brought more Healing staves along... but I left so many back with the other group, for fear that I'd need to use them at some point. *mistake*
Ena: Level 23 Red Dragon
Well, shit. Ena is necessary and very important because of the fact that she can boost your units' Strength and Skill, giving you a little bit of hope. However, she's BARELY strong enough to survive attacks from the great final boss, and I'm always scared that I'll lose her. And losing her makes things a level tougher for everyone else.
Reyson: Level 31 Heron
Oh man. Reyson, of course, is nothing but useful. With his inflated Movement of 10, thanks to the boots that I gave him, he is absolutely essential to everything I do in this battle. If there is one complaint I have about him, it's with Herons in general: Their Laguz-Juice runs out too damn fast, but without him in a transformed state, his usefulness is about 25% of what it is otherwise (ha ha).
These are the people I brought in. Can I do it this time?? I'll try again shortly...
Matt