You don't need to control the whole map to win the game. I am following the main quest line to unite the empire. [spoiler alert for the main quest here] It's basically independent->control 2/3 empire towns (13 or 14 imperial towns I think) ->force Vlandia, Sturgia, and Asari to have peace (you have 3 meter bars to fill by defeating their armies and capturing settlements), and then the system will pop out the message that you are victorious. And after this point you have unified the empire and all western, northern, and southern empire will join you, so you get all their lords and settlements. 2 of my playthrough got this point around 1000 - 1100 days, with or without mods. I was using Charm characters. It's hard at the beginning. but once you have lords starting to join you through persuasion, at one point you are just snowballing and steamrolling other factions. It's not that hard after a critical point. Both of my playthrough achieved tier 6 clan in 1000 days, with mods it's much easier (fix and tweak mods).I see them in the list. There's a dummy armor max with 55 and some helmet with 58 and some other likely items with 50's. I'll see if I can pick one up and when on this play. If you're taking over the map by 1000 days I'd like you to share that one. Even killing everything I come across I can't see map control by then. I think I can barely get tier 5 by 1k days. Been defeating lords a lot on this play so maybe I should pay more attention to the loot.
I don't know why you think I would make this up and ask for proof, and I don't need your approval either. It's up to you if you want to believe it or not.