It's a common word of advice to consider how much removal you're running, but there are other numbers many cube designers don't track that are also important. I'd recommend anyone serious about making a good cube to take into account:
- how much card advantage and virtual card advantage each color has
- how many mana sinks each color has
- where the removal falls across the mana curve for each color and how conditional it is
- how much evasion is in each color and where it is on the mana curve
- how much token production is in the format
You can then mash these various charts together and get an idea of what each pair seems to be trying to do and what each pair is struggling with, keeping your eye out for holes in the format and
unnecessary duplication. Unnecessary duplication happens when there are too many of a certain effect to the point where the drafter's choice no longer matters.For example, many people pack their white 3s and green 3s to the brim with effects that, when considered together, make the choices in that deck meaningless, or, worse still, present a "drafting trap" where the best cards for the pair all seem to fall at an over-stacked 3 drop slot. This problem is probably most frequently found in sections where too many aggressive tools have been provided that seem unique but really aren't, but it can also be an issue with stacking token producers or efficient removal tools. (Obviously, all of this hinges on what's best for your desired power level).
On the flip side, you'll also want to be vigilant for where you need to increase
redundancy. The
pants deck might not need 6 3-drop auras, but it certainly wants more than just one
Rancor. Similarly, if your
theme is self-mill, you're going to need more than just a
Nephalia Drownyard to support it. Consider while you tune your redundant cards how they compare, power-wise, to each other. For example,
Seasons Past is a popular and powerful card for a deck oriented around recursion, but it can make
Gaea's Blessing and
Revive seem extremely lackluster in comparison, to the point where drafters might never actually consider picking them.
(edit: lmao just realized this was a bit of a necro but w/e)