Guys, he was talking about the Marth remake.
And obviously Hector is awesome. He's practically godly.
Myrrh actually sucks on Lagdou Ruins 10, probably because she will have the worst stats. If you recall, all her stats cap at 20 regardless of her other boosts (recall that Wretched Air ignores Defense), and although she 2HKOs the dragons, so can anyone else with a legendary weapon.
Oh yeah, and she's weak to arrows.
In regards to Lagdou Ruins 10, you need level 20 guys, maxed out stats, good support convos, and legendary weapons. Don't spread out, stay in one place. The zombies only move if you go within range (but the boss, fortunately, doesn't move at all), so if everyone stays in one place, you can pick them off one at a time. I recommend taking the top ones first and then slowly working your way down.
Innes and Saleh are probably the best characters, as Innes has EPIC DODGE HAX and can counter them quite handily. Saleh almost has as good of dodge hax. But of course, don't forget your support and weapons. The only extra character you should even consider using is Riev. All the other extras suck for this floor.
I got Lyon in that game. I know what I'm doing. (If you can exploit the Lagdou Ruins bug and get Demon Surge, that will be all the better for Riev.)
To work your way up I recommend you just use iron and steel weapons primarily, and have a killer one on hand just in case. Have Rennac at a high level also, so you can swipe all the treasure.