You're doing better! All you really need to work on is trying to get Cuan and his wife on some high levels so their kids can get some good stats. I would try to get the wife by somewhere in the mid 20s and Cuan somewhere in the late 20s.
Yo, use Lachesis's staff powers to heal the units and ****. That how you level up faster.
Just like go to the arena a few times with characters who can't fight there for ****. It might take about 30 mins to a hour but I got her to level 20 that way that soon.