This is NOT a deck. But it is EXTREMELY helpful.
These are statistically the best ratios of a mountain/forest deck:
Creatures/Artifacts:
1 mana: 5
2 mana: 6
3 mana: 4
4 mana: 1
5 mana: 1
6 mana: 1
7 mana: 1
8+ mana: 1
Total: 20
Enchantments/Sorcery:
1 mana: 7
2 mana: 6
3 mana: 2
4 mana: 2
5 mana: 3
6+ mana: 1
Total: 21
All lands: 19.
Please reply your opinions on these numbers.