I agree with the guys, I think the cube is too large. You mentioned ravnica block as a model.
I would go to 500 cards, this would be like combining Ravnica Allegiance with Guilds of Ravnica.
If we look at a set like guilds of ravnica, the set is 250 cards. 75 of these cards are multicolored. Therefore, roughly 30 percent of the set is multicolored spells. Your cube is a at 27%. If your cube was 500 cards, then 150 cards would be multicolored to maintain the same ratio. This would mean 15 cards in each guild.
Also, if you are having trouble putting a pod of 8 together, then you are incentivized to have a smaller cube. This will make the putting the decks together easier, as the cube will be more dense.
If you went 500 cards, I would run 35 lands. putting your mana fixing at about 7% of the cube. This would be a tad better than 1 land per pack.
I would trim to
57 cards of each color
15 of each guild
35 lands
30 artifacts
again, this is assuming you are trying to mimic ravnica block.
If you are trying to support tribal, perhaps include some tribal support cards like vanquisher's banner, heralds horn, and coat of arms. These cards would work in any tribal deck.
Lastly, after drafting your cube, I really felt the need for original duals. There just were not enough targets for my fetches. I only saw man-lands and tri-taplands, basically making my fetches worthless, because it was not on both my colors. I would get dual proxies at least to smooth this out. You won't believe how much better your cube drafts.
I would go to 500 cards, this would be like combining Ravnica Allegiance with Guilds of Ravnica.
If we look at a set like guilds of ravnica, the set is 250 cards. 75 of these cards are multicolored. Therefore, roughly 30 percent of the set is multicolored spells. Your cube is a at 27%. If your cube was 500 cards, then 150 cards would be multicolored to maintain the same ratio. This would mean 15 cards in each guild.
Also, if you are having trouble putting a pod of 8 together, then you are incentivized to have a smaller cube. This will make the putting the decks together easier, as the cube will be more dense.
If you went 500 cards, I would run 35 lands. putting your mana fixing at about 7% of the cube. This would be a tad better than 1 land per pack.
I would trim to
57 cards of each color
15 of each guild
35 lands
30 artifacts
again, this is assuming you are trying to mimic ravnica block.
If you are trying to support tribal, perhaps include some tribal support cards like vanquisher's banner, heralds horn, and coat of arms. These cards would work in any tribal deck.
Lastly, after drafting your cube, I really felt the need for original duals. There just were not enough targets for my fetches. I only saw man-lands and tri-taplands, basically making my fetches worthless, because it was not on both my colors. I would get dual proxies at least to smooth this out. You won't believe how much better your cube drafts.