It is ridiculously easy. It is absolutely possible to win against all ridiculous AIs in under 100 turns without touching the warfare tree at all. All you need is exploration for the endless gold and treasures and magic item research under magic for ~20-40 movement worth of boots.
Landack
I assumed this was just another bug, but maybe I was being too generous.
Looks like a camp and has a green flag. Seems to just open the equip menu so I assume that's what it is. No tooltip appears though.
Makes little selection squares wherever you drag. They go away by releasing the button and moving over them again. Just a little cosmetic/polish bug.
Boots that mean something (give movement for example). Is there a reason for this? Does the race even do anything besides this and appearances?
Yeah, I tried it a few different ways. Sometimes the tech screen is all blank text and white circles... sometimes you get some of the graphics and text but I couldn't get it to actually work. Kingdom factions seem to work fine.
If you have any saved games available, just load one before you made it. Will probably take care of it, although obviously this is not the best solution.
Hitting back after choosing a custom faction in a new game puts you into editing that faction instead of back to faction select (so you then have to exit faction editing and go back to new game). Seems like any 'Empire' custom faction's tech research is completely broken. At least that is the only pattern I can see. I advise against making them for now. Loading a game will reset all custom factions to what they were when that game was loaded. Remo