Make sure you use ether-based spells and take care of the adds as they come.
I'd also have Riki and a third (if you haven't figured out how to manage without Sharla she's fine, but otherwise another character is probably more effective).I had very little trouble with Lorithia, but then again I used Melia a lot.I got stuck here too on my first playthrough (played Sharla only) and got wrecked with the endboss. Although I find battles slower in my Skell, waiting for lvl 30 for better Skell with better weapons!I'd recommend finishing the Skell licence if you've not, then explore with and plant probes with your Skell.After that, walk throughout residential/industrial/administrative region to get missions. I found the best place at that level was raguel lake- north side. As there were a ton of affinty/side quests i kinda passed over. At this point in the game I was ignoring the people telling me to grind to Lv76 because I was getting bored and grinding was the last thing I wanted to waste time on.I also don't think a team of Shulk/Reyn/Sharla is bad, I was having trouble with the final boss at Lv78 and swapped Melia to Sharla which almost turned it into a joke, she makes fights last longer than they should but she makes them way easier to manage.The ai is awful at Melia. THIS FOE IS BEYOND ANY OF YOU! I've read that after you get your skell, you have lots of opportunities to level up quickly, so I would recommend taking on smaller, but higher level enemies for the xp.Have you unlocked a Skell? Name: Son (Son1994) Karma. One of the issues that is preventing me from continuing is how slow I am leveling. They have a special frame around their names, as well. It's easier if you pick them as your controllable character (place them on the first slot) and if you pick smaller enemies but with higher level.I didn't really do that though, I chose to keep exploring and evading areas too tough. I would suggest taking your skell out and hammering on some higher level baddies to build up some. You can play the epilogue by choosing it at the Title Screen. Riki's High HP pool can survive this attack, allowing you to live and make a comeback. She will spawn more, but its easier to fight her as you.takr down them down first.
I'm at level 25, btw. I just want to progress with the story. This Boss Guide will help you prepare for the storyline bosses you will encounter in Xenoblade Chronicles. I am at 120 hours in the game and right now at the endboss, but you can also probably beat the game at 50-60 hours. I've been stuck on this boss for 2 weeks now and it has slowed this game to a fucking crawl. Riki and Melia build up chain attacks super fast so you can always have this combo built up and Dunban builds up Blossom Dance pretty quickly plus his tells are easy to predict if he has it up since Blossom Dance has a very recognizable voice line, Soaring Tempest is easy to see and Jaws of Death if Dunban suddenly dies but is at full HP again.Just make sure you have some practice with Melia since she can be hard to learn but is easily the funnest character to play as in the entire game Stack Melia up on Ether resistance as much as you possibly can.