To add content for Beastro, here's a rundown of the battle, starting point and results.
You didn't do that badly Bing, I committed a lot. Specifically, a lot more mages and gems, which is where the real power lies past the earlygame. If you are playing a big bless nation your troops can still do well as your main killing power (Mictlan plays like this, for instance), but otherwise it's mostly about having enough of a front line for the mages to do the work or, alternatively, for your mages to buff your guys up enough to survive the onslaught of the enemy mages and sacreds and break through.
Numbers of regular troops don't matter that much any more unless you're Ermor or Sceleria and going in with literally thousands of undead.
For instance, in this battle you could have brought 20 reborns and sauromancers to skellyspam, not 6. And then had a small communion of shamans (like 4 slaves and one master) casting relief, antimagic, mass protection and mass regeneration, depending on research. And an astral random sauromancer joining the communion to spam skeletons and then cast rigor mortis in spell slot 5, so my mages tire out but your mages have pretty much burned all their fatigue on skeletons already. And a water random Sauromancer casting Foul Vapors with a thistle mace and two nature gems
Probably someone casting quagmire as well, if you can.
That's just sort of the basics for a midgame C'tis army,
before the application of tricks or any specialized tactics. A lot of it is about layering on a ton of stuff against the enemy.