I know this sounds like an odd suggestion, but I think it would be really useful.
When there is a large clusterfudge battle going on with a a few Demigods and a ton of minions going on at once, it gets really hard to tell your friendly Demigods apart from the others. This is particularly frustrating when playing as Sedna where you have the ability to heal friendly Demigods.
I think outlining Demigods based on the light/dark side, or just outlining your teammates would help a lot. What I mean by outlining is how the survivors are outlined in Left 4 Dead. You can easily tell your friendly Demigods apart from the pack.
What do you think?
