this set up gives you the maximum amount of galeforcers, as well as 3 armsthrift sorcs and great stat mods for everybody.
sumia!lucina - galeforce, better mods than olivia, canon pairing, gets both pavise and aegis chrom!cynthia- aether, great stat mods MU!noire- galeforce, armsthrift, good mods tharja!morgan- see above donnel!kjelle- galeforce, armsthrift gaius!nah- galeforce, passes counter or sol, doesnt screw her speed as bad lon'qu!severa- mods, swordfaire, MODS. vaike!inigo- mods. thats honestly it. stahl!panne- mods, amazing skill pool frederick!gerome- those mods. also, great skill pool gregor!laurent- armsthrift and good mods henry!brady- access to sorc, and great mods virion!owain- mods.
*gaius and donnel could potentially swap wives for superior mods, but nah does not need armsthrift as much as kjelle. also, i like making kjelle an assassin, and the +luck from donnel makes that slightly more awesome.
*lon'qu and vaike can potentially swap wives. this gives severa access to axefaire, which lets her be an axe hero instead of a sword hero. overall though, the mods were previously better if they stick with the wives i mention.
also it seems like you're prioritizing mods too much
mods are important. and i did sacrifice mods on kjelle for armsthrift.
gaius gives nah galeforce, and is only 4 less defense than kellam, who also gives her even worse speed while gaius rescues her speed somewhat. gaius also passes sol or counter, which are good for a tank.
Cynthia - Chrom kinda sucked as his parent. Admitably this make a pretty cool pair up fodder. PavGis Cynthia sounds pretty cool though. Also Aether on her is pretty crappy
i like making cynthia a sniper. galeforce sniper as pair up fodder is actually very good, and it removes that weakness of snipers being worthless on the opponents turn. chrom gives her aether and sniper.