I'm playing against them in SP (Kaliasa vs. Formoria w/Marverni squashed in the middle).
I noted they have an Unmarked Formorian - apparently, a Formorian Commander w/out the typical Affliction.
I've also seen a Giant Commander running around, but I don't see it too often, possibly an upgunned Giant?
Finally, i've noticed Formor armies using large numbers of mixed Fir Bolg and Formorians, and have observed that the smaller size of the Formorians do allow the Fir Bolgs to move through their formations to attack. This is pretty useful.
Being Kaliasa, we both suffer from low Prot units, and archers are pluperfect hell on both of us

I usually use Ambush of Tigers as suicide cavalry to take out the archers, but the Formorian units also use javelins, ugh

__________________
"Hello, mother. I come bearing a gift. I'll give you a hint. It's in my diaper and it's not a toaster."
- Stewie Griffin
"The artifact which is the source of my power will not be kept on the Mountain of Despair beyond the River of Fire guarded by the Dragons of Eternity. It will be in my safe-deposit box. The same applies to the object which is my one weakness."
- The Top 100 Things I'd Do If I Ever Became An Evil Overlord
http://www.eviloverlord.com/lists/overlord.html
The Brain: Pinky, are you pondering what I'm pondering?
Pinky: I think so, Brain, but then it'd be Snow White and the Seven Samurai...
-Pinky and the Brain
http://www.lolthulhu.com/
-Props to S.R. Krol