While the land suggestion tool is kinda cool, I find it does little when using hybrids. I will make 1- and 2-color (by land) decks than have 3 or more colors represented in symbols. It would be nice to be able to exclude a color that only appears in hybrid symbols.

On that, I modified a spreadsheet I found that takes the deck size, number of land, and number needed by a specified turn. With that, it suggests the number of land that would be appropriate to have the optimal chance of drawing that way (let's face it: 24 is a bit rich for a lot of decks). My version averages the numbers for going first or second in a duel, so it effectively is a first-turn holding, as the second player has 8 cards on turn one.