-Layer 5 is a Fundamental, which starts immune to all damage and loses its immunity when its shards are reunited; use the Invulnerable token at the start, when it's immune to damage, and switch to the Vulnerable token when its shards have been reunited.

-Layer 4 is an Adamant, which has mechanics centering around its absurdly high armor. Since the players will be about LL5 by the time they fight B1, it would be Tier 2, and so would have 15 Armor; start with the Full Armor token for when it has 11-15 armor, switch to the Half Armor token when it's reduced to 6-10 armor, and switch again to the Null Armor token when it's reduced to 0-5 armor.

-Layer 1 is an Abyssal, which looks essentially identical to its shards. Just use the same token for the eidolon itself as well as its shards for this layer.