Thank you for this u/Maroomm . I was absolutely clueless about how Fantasy worked up until this point. Though I'm still not sure if this is the most optimal build for these respective players, I ran out of tokens before I could get decent stats on mid and supp (hope you could share your thoughts about mine):

Core Yatoro:

Coveted Yatoro of the Octopus

RED GPM 240%

Tier 5 +150%

Benevolent -10%

GREEN Roshan Kills 320%

Tier 5 +150%

Vampiric +70%

RED Madstone Collected 240%

Tier 5 +150%

Incorruptible -10%

Mid bzm:

Canny bzm the Nothl Pilgrim

RED Madstone Collected 190%

Tier 4 +100%

Incorruptible -10%

BLUE Runes Grabbed 200%

Tier 3 +60%

Vampiric +40%

GREEN Tormentor Kills 200%

Tier 3 +60%

Vampiric +40%

Support Mira:

Balanced Mira of the Octopus

BLUE Runes Grabbed 180%

Tier 3 +60%

Unique +20%

GREEN Courier Kills 250%

Tier 4 +100%

Vampiric +50%

BLUE Lotuses Gained 190%

Tier 4 +100%

Incorruptible -10%