Considering the current eco mechanics, this is what i would see optimal.
Basic Mex income:
Manually adjusted, you can pick what % to share and who to share to.
Default: 25% sharing.
Excess metal:
Its obviously 100% sharing, would be nice to choose who you excess to though.
Excess energy AKA OD income:
Total communism, income is evenly shared for entire team. Due to diminishing returns, this is the only option that allows for optimal OD and doesnt encourage bad behaviour (building Singus way past economic viability just to increase your share in total OD income).
Reclaim:
Adjustable, separately from mex income.
Default: 0%
Commander income:
Individual, but decreased to something like +2/+2.
Con income:
Removed completely.
In addition, i'd suggest adding +1/+1 basic global income for every player (or for every com you started with).
The +1/+1 is enough for a slow comeback after fleeing with a con, and the con/nano-based eco is just silly and goes against the design of OD.