If you pair Yggdrasil (with Rings) with your Carry Tower, Does your carry get double benefits from Potions? That would be really op, not even counting that you could have 3 really strong subcarries.
Yes, this is going to work. It's really intendend to give Nature a buff, to compete with Darkness / Metro in the endgame. What's not going to work however is recursive potions. The wedding ring is not triggered, when the carrying tower is receiving a potion through a branch.