Based on the battle and looking over the map I'm guessing you didn't recruit many (any?) nemedians. Do you think they're no good or did you simply go with a build that's not suited for them. You'd probably want to take some production at the expense of a bless if you're going to get the nemedian troops, and you seemed to have shelled out for a decent bless. And what about Fomorian Kings, do you think you got enough mileage out of them to justify the fact that you could have had twice as many sorceresses?
That's actually something that I would've liked to do more of - make more nemedians - the warriors, at least. Mostly because they play very well with unmarked, filling up empty space in the square while markedly increasing the overall offense/defense of that square over just a regular fir bolg (which I also didn't make enough of). Instead I was using mostly undead chaff - which works, but isn't great.
9N4E, 1Prod, 1 Cold, 2 Luck, 1 Magic. I could perhaps have gone with 1 less luck and 1 more production to help produce my cap-only troops; since even though I started in a forest next to two other forests, for a respectable 203 resources, that's still only enough to build 7 unmarked a turn, without anything left over for nemedians, and only a single fir bolg.
So, Kings pro: big bags of HPs, can go underwater, sacred, an extra 1 air (over the nemedians) then +1AWD and 10% AWD. The fact that the nemedians' extra +1 and 10% are both AWDN spreads them out a little too thin, I found. I was mostly looking for big air power to fuel thunder strikes, living clouds, fog warriors, phantasmal armies, and I was more likely to get that with the kings. In the end, it really came down to the HPs/sacred status, since I needed mages that wouldn't melt under Abysian firestorms, and the Kings could regenerate without any extra equipment.
Also your cap seemed to have a ton of Fomorian Druids on research duty with quills. I would imagine that Fir Bolg would be far more cost-effective, but I guess they were part researchers, part garrison in case the squid decided to land near there. I know I'd rather pick Fomorians any day of the week over Fir Bolg when it comes to battle casting.
It's actually close, since the druids are sacred. And yeah, I'd rather have the druids as backup battlemages any day over the Fir Bolg. Only exception - it's worth picking them up until you get an earth random, so he can search for more sites - didn't want to waste my pretender's time looking for earth gem income.