a single highly skilled axedwarf will wipe out ALL the elves!
Right up until a lucky shot from an elven marksman hits him in the face.
In worldgen, battles are done one on one. This is why you see Tholtig defeating whole armies, because she's fighting one elf at a time, and she's individually better than any single enemy. Worldgen battles don't allow for ganging up. Thus, if an army arc battle is the same, one danger room and a steel axe, and you can wipe out the elves!
Give the detailed treatment Toady is giving werewolves and zombies right now, I have a hunch he'll be making a few changes to how that works.
Consult DF talks, also consult his ToDo list when he was cleaning up DF2010 - battle formations, regimental tactical maneuveurs, competence of the commander... by the time we send off soldiers we'll need to give the danger-room equivalent of military education to the officers and commanders who will lead our supersoldier dwarves. Actually, given most of our soldiers will be recruited from the hill dwarf settlements, the dwarves we train will probably be crack commandos and officers.
But the real question is: can we also send off mobile siege weapons with our soldiers? Or at least, tamed war beasts?