My Argonosh literally CARRIED holy crap.
[totally did not have mods that gives me cheap tech to boost my units defense and others to have more stuff]
About 2800 vs 12000+.
Marched on a empire that I KNEW was far superior to mine but didnt see their HUGE ARMIES that FAR OUTWEIGHED my own even though my forces had far better quality individually and I didnt really send all I've got. When I saw the numbers I was like holy shit I dont think I'm making it out alive but decided to go with it anyway.
Left a false gap in the middle that they never pushed and kept my Argonosh behind the front-center near the gap.
The Argonosh came out the middle and sent them advancing into one of their flanks which QUICKLY COLLAPSED as they pushed and later managed to envelop their other flank with the rest of my forces that the Argonosh saved which later sent them running.
Quality really beats quantity if you play your cards right. [even without mods i hope..]
Hannibal+Reverse Helldivers typa shit my 200 Argonosh got to pull off with 100% training and max armor.
Also Argonosh seems easier to obtain if your Garmithis and with some luck I got to have more then 3 havens within my regions that I took control of that were quite nearby.