I haven’t enhanced any gems yet and have just been collecting them. I understand other gems, gear and materials can be used to upgrade gems. I also know the cost of upgrading gems increases with each upgrade level.
What are some tips you have come across with gem enhancement?
For example, is there a certain character level that we should wait before we enhance any of our gear, since gear is rotated out of use at certain character level points? Or is not worth upgrading gems until endgame since gems can’t be removed and kept?

