Requiring less sleep for spells [PF]

[Sheogoroth]

I'm playing a human witch in kingmaker, and I'm trying to figure out a way to squeeze some extra time out of the day. I would like to maybe cut my sleep requirements by as much as possible.
I have access to all 3.PF materials(third party included.)

Are there any feats along this vein?

[icefractal]

It's somewhat high level and/or expensive, but Create Greater Demiplane lets you set the time rate at 2x speed, as well as make a permanent portal to any location you're sufficiently familiar with. Put the portal in the castle, use it as your bedroom, and now you only need four hours of sleep (effectively). Also provides some protection against teleporting assassins.

Standard Way:
Scroll of Create Lesser Demiplane (1125 gp)
Scroll of Permanency w/ 17.5K invested (18,625 gp)
2x Scroll of Create Greater Demiplane (7650 gp)
Create it and make it permanent as a lesser demiplane, then add the Time and Portal properties with the CGD scrolls.

Cheese Way:
Scroll of Astral Projection (3825 gp)
Borrow all of the scrolls from the standard way, Astral Project with them, use the astral copies of the scrolls to make your demiplane. Then end the Astral Projection and return the scrolls.
Or if nobody want to lend you scrolls, you can still make more than one demiplane from a single set this way.

Most of these are Witch spells, so if you're high enough level you can cast them yourself and cut out the middle-man.

[Bhaakon]

Ring of Sustenance is the go-to, which allows you to going the benefit of 8 hours of rest in a mere 2 hours. It's relatively inexpensive at 2500 gp, so it should be in reach by level 3 or so (I'm not sure how much gold Kingmaker hands out, or how often you can shop). There's also the light sleeper trait, which lets you sleep 4 hours to gain a full night's rest (the text focuses on the healing benefits of rest, though, so a quarrelsome GM might rule that it doesn't work for spell preparation).

On the plus side, witch hexes are generally inexhaustible. So unless you loaded up on all the once-per-target-per-day buff hexes, you've got a lot more endurance than a typical low-level arcane caster. Most combats, you're probably not even going to cast a spell.

[Jack_Simth]

I'm playing a human witch in kingmaker, and I'm trying to figure out a way to squeeze some extra time out of the day. I would like to maybe cut my sleep requirements by as much as possible.
I have access to all 3.PF materials(third party included.)

Are there any feats along this vein?

Let's see... can you get spells off-list? The Keep Watch (http://www.d20pfsrd.com/magic/all-spells/k/keep-watch) spell might be useful, as could Nap Stack (http://www.d20pfsrd.com/magic/all-spells/n/nap-stack).

There's also the Everwake Amulet (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/a-b/amulet-everwake), in addition to the standard Ring of Sustenance (http://www.d20pfsrd.com/magic-items/rings/ring-of-sustenance) that others have mentioned.

[Extra Anchovies]

What you really want is a Heward's Fortifying Bedroll (Complete Mage, p. 133). It gives you the benefit of 8 hours of rest in a span of 1 hour, and explicitly allows you to prepare spells when the hour is up. It's only 500 gp more than a ring of sustenance.

[Jack_Simth]

What you really want is a Heward's Fortifying Bedroll (Complete Mage, p. 133). It gives you the benefit of 8 hours of rest in a span of 1 hour, and explicitly allows you to prepare spells when the hour is up. It's only 500 gp more than a ring of sustenance.A person can only benefit from it every other day, however.