This is the absolute highest I've been able to achieve so far with one unit . . . Although I'm absolutely sure any max-stats 2nd Gen or 3rd Gen Morgan could push the limit even farther.
Behold, Micaiah the Priestess of Dawn, bringer of ultimate divine justice.
Defender, All Stats +2, Magic +2, Tomefaire, Valflame (grants +5 Magic), paired with another max-stats Sage, with Rally Spectrum, Heart, Magic, Skill and Luck, and then all stat-boosting items enabled. She has a rating of 413 with all of that.
Using the Book of Naga has 126 attack with a 50% chance of critical on that Wyvern Rider.
208 Hours logged, played every single day since midnight release on February 4th. Thoroughly defeated Pokemon in terms of playtime... (Pokemon White has 109 Hours)
I feel like I've gotten way more than my money's worth.
I just wish there was a real multiplayer component. I'd love to actually FIGHT someone in 1 vs. 1, and not just in StreetPass.