Gold sharing at the citadel
I know there are some similar threads up, but neither of them address it this way
Demigod Forums
A number of RTS games have the option to send your teammates resources(there's usually a penalty associated with this). Obviously it can be done with buy an item, drop it, teammate picks it up and sells it for 80% of the cost. However, this is a team game so it should include mechanics that reward working as a team(and sharing resources is obviously one of these mechanics).
An easy way to implement a gold sharing mechanic is to have a team piggy bank at the citadel that allows anyone to deposit or withdraw a specified amount of gold. This would allow for greater cooperation in buying both citadel upgrades and items. For example, a team could pool their gold for an early heart of life, and then share it with each other so they all get the effect. It would just lead to a greater potential for cooperative teamplay to have this kind of feature.