Yellow Grimoires grant 1.5 times the reward of Green Grimoires .
Red Grimoires grant 2 times the reward of Yellow Grimoires.
(The ratio between the different choices is always the same across the 3 grimoire rarities.)

This section compares the rewards of consumables with those of Green Grimoires.


Ratio shows how much of a stat is rewarded compared to a Green Grimoire, e.g. for Vitality: 6/16 = 0,375 = 37,5%

Consumables grant 2/3rds (~66,6%) of the value of offensive stats (Damage, Crit Damage, Crit Chance) (subject to rounding), but only 37,5% of defensive stats (Vitality, Armor).

Some stats are generally better acquired through means other than Grimoires/Consumables.

Damage has powerful items that can be used instead. Additionally, damage can be increased by using Iron Maidens. Also, there's a refugee giving you +10 damage for cursing an ability.

• Iron Maiden/Sacrifical Idol (+5 Dmg)
  
• Refugee (Curse an ability for +10 Dmg)
  
• Items
  
  • Ogre Blood (Common)
    
  • Golden Egg (Rare)
    
  • Excalibur (Legendary)
    
  • Hungry Grass (Cursed)
    
  • Oni Mask (Cursed)

Vitality can be gained by using Healing Fountains. Vitality also has a few items available, with Philosopher's Stone being especially powerful.

• Healing Fountain (+10 Vitality)
  
• Items
  
  • Philosopher's Stone (Legendary)
    
  • Water of Life (Legendary)
    
  • Cauldron of Dyrnwch (Cursed)

Stars of Fate can be acquired from Astral Shrines, Refugees and the shop.

• Astral Shrine
  
• Refugees
  
• Shop (for 50 Dream Shards)
  
• Items
  
  • Leprechaun Coin (Common)
    
  • Tamatebako (Legendary)

Dream Shards can be acquired in a lot of other ways, mostly Dream Shard POIs and medium/small Dream Shard deposits in between POIs. Taking Dream Shards at Grimoires is probably only worth it if you need the money to buy something specific or you're running Golden Egg/Excalibur.

• Dream Shard POI
  
• Dream Shard Deposit (small/medium)
  
• Refugees (Sell Item)
  
• Items
  
  • Golden Egg Super Effect (Rare)
    
  • Hope Diamond (Cursed)

Grimoires of all rarities award all stats with the same ratio, there is no difference between rarities.

Consumables are better for offensive stats than Grimoires.
Oversimplified, getting 2 consumables is better than a Green Grimoire when getting offensive stats (2x 66,6% = 133,2% of stats), but worse when getting defensive stats (2x 37,5% = 75% of stats).

Damage, Vitality, Dream Shards and Stars of Fate can be acquired by other means, so Consumables should mostly be used for Crit Chance or Crit Damage while Grimoires should be used for Crit Chance, Crit Damage or Armor .

Thanks to Pam for feedback, suggestions and answering questions!