This a cube based on Khans of Tarkir draft aimed at a small number of drafters. Since there's only a few drafters (2-3), the cube size was reduced to 240, and intended to use 12 20 card packs (9c-7u-4r/mr). 5 packs each for sealed, 4 packs each for a 3 person draft or (in a pinch) 3 packs each for a 4 person draft. You can also split packs in half for a grid draft (just ignore the last couple commons). Generally 20x12 seemed to offer the best portability and flexibility for me given that there's not a lot of drafters in my area.

As such, about 1/3 of rares and mythics had to be removed to so that the ratio of commons/uncommons/rares isn't overly influenced. At all levels of rarity, low synergy and low power cards were removed to add more options and replayability when drafting (the rares with extreme prejudice). These were replaced with (appropriate for the rarity class) synergistic cards from other sets (the vast majority being FRF, a small number from DTK, and about 4-5 cards from sets across magic's history). Overall, I replaced about 35 commons and uncommons, and 20 or so rares). I replaced expensive and fairly unsynergistic fetch lands with the thriving lands from jumpstart, which is intended to add some more multicolor shenanigans (also aided by a few hybrid mythics from FRF) and reduce the need to spend high picks on fixing. I also elected to boost the GB toughness/sacrifice theme as that archetype was historically weak and tried to otherwise avoid changing the power level of the other archetypes.

Rarity weirdness: Assault formation is a rare, as it was in dtk. Ancient ziggurat is a rare. Strategic planning is a common. The thriving lands are uncommons.

As long as you consider the hybrid cards from FRF as gold cards, color balance was mantained. If you do not, there is a slight bias as the abzan members from their cycle were unimpressive to me and removed in favor of other "true gold" options (also happened to tasigur, and narset is still busy taking infinite turns in EDH and she's kind of bad in limited so elsha of the infinite tapped in as khan).

All commons and uncommons are color balanced if you consider the off-color activation commons from ktk as gold cards (I replaced kheru dreadmaw and Firehoof Cavalry for the more relevant Warflare and Grim Contest). I added a cycle of removal at common to hopefully avoid bombs dictating draft too much (since some of the FRF mythics are quite powerful and the number of rares/mythics is twice as high in this cube as in a normal draft).

All in all I tried to lean into what KtK and FrF draft is about and remove non-decisions from the drafting experience, while hopefully helping replayability and depth of the format (since at only 240 cards it needs it). The entire cube is singleton. If you want to draft with more players, you can buy a second copy of the uncommons and commons, this raises the card count to 432 (enough for an 8 person draft) and brings the rare and mythic count down to the normal amount in an actual ktk pack. If you remove 6 of the colorless commons and uncommons at this point, you'll have 420 cards that you can make 21 even, rarity and color balanced 20 card packs in (18 commons/uncommons - 2 rare and mythic rare).

I know the format with the number of cards is weird, but given the constraints of the size of the cube I am proud of the product. In general when it came to card valuation I used limited resources set reviews (and sunset shows, and crack-a-packs, and set review reviews and oh so much extra podcast time and flashback draft videos) as my guide.