I recently played horde and had this thought:
Horde doesn't have over the demesne limit, a modifier that is basically -90% to levies and tax income and your vassals hate you, they only get the local modifier for the wrong holding type which is a local -75% to levies and tax income.
Now here comes the fun part of the thought:
Levies: Since you can increase your local levies with your own martial skill (+5% per martial, starting at 10 martial) and with the right religions, you can basically offset the negative modifier for wrong holding type
Tax income: This one is harder, since stewardship effects your global tax income, not your local. But with religious taxes you get +25% tax income for holdings/counties with different religion. So you basically get 50% tax income from your holdings.
Now to the strategy (Needs at least Horse Lord and Holy Fury DLCs):
Start as a tengri horde (or convert to tengri if your horde doesn't have tengri), join the Eagle warriors and rank up until rank 2, then save the society currency.
Do "call of the steppe" (intrigue decision, requires tengri and rank 2 of Eagle warriors) and get as many 25 prestige troops as possible and at least enough population for the Nomadic Invasion CB (30.000 and at least 75% of max)
Nomadic Invade a feudal kingdom, occupy as much as possible, you'll keep everything occupied from the main target realm, even the stuff outside of the target kingdom since it is an invasion
Revoke every vassal so that you own every holding, but don't raze anything and dont pillage, if a pillaging event pops up during siege
Switch religion from Tengri to Germanic and reform the faith with:
Nature: Any that doesn't convert, or is less likely to convert and any that doesn't reduce the levies (e.g.: No Proselytizing and no Unyielding)
Doctrine: Religious Tax + a free slot that you can fill as you please
Leadership: Autonomous is preferable for the direct +2 Martial (Germanic and Tengri specific bonus), but the others can get +2 martial too through the great holy war trait
Since you never actually acquire new nomadic lands, you will never have to fear any minor (haha, quite the misnomer actually) clan uprisings and your other clan(s) won't demand any new land. Just conquer feudal land at your hearts content, at some point not even your own holy order will be able to stop you (they will try though, if your threat level is high enough)
Horde doesn't have over the demesne limit, a modifier that is basically -90% to levies and tax income and your vassals hate you, they only get the local modifier for the wrong holding type which is a local -75% to levies and tax income.
Now here comes the fun part of the thought:
Levies: Since you can increase your local levies with your own martial skill (+5% per martial, starting at 10 martial) and with the right religions, you can basically offset the negative modifier for wrong holding type
Tax income: This one is harder, since stewardship effects your global tax income, not your local. But with religious taxes you get +25% tax income for holdings/counties with different religion. So you basically get 50% tax income from your holdings.
Now to the strategy (Needs at least Horse Lord and Holy Fury DLCs):
Start as a tengri horde (or convert to tengri if your horde doesn't have tengri), join the Eagle warriors and rank up until rank 2, then save the society currency.
Do "call of the steppe" (intrigue decision, requires tengri and rank 2 of Eagle warriors) and get as many 25 prestige troops as possible and at least enough population for the Nomadic Invasion CB (30.000 and at least 75% of max)
Nomadic Invade a feudal kingdom, occupy as much as possible, you'll keep everything occupied from the main target realm, even the stuff outside of the target kingdom since it is an invasion
Revoke every vassal so that you own every holding, but don't raze anything and dont pillage, if a pillaging event pops up during siege
Switch religion from Tengri to Germanic and reform the faith with:
Nature: Any that doesn't convert, or is less likely to convert and any that doesn't reduce the levies (e.g.: No Proselytizing and no Unyielding)
Doctrine: Religious Tax + a free slot that you can fill as you please
Leadership: Autonomous is preferable for the direct +2 Martial (Germanic and Tengri specific bonus), but the others can get +2 martial too through the great holy war trait
Since you never actually acquire new nomadic lands, you will never have to fear any minor (haha, quite the misnomer actually) clan uprisings and your other clan(s) won't demand any new land. Just conquer feudal land at your hearts content, at some point not even your own holy order will be able to stop you (they will try though, if your threat level is high enough)