It would be cool, to change a Biotics metabolism to say Photosynthesis or Lithovore.
Picture it, a Biotic who ate Rocks, sand, etc...would be great in a group. Easy to find food, no hunting needed. Good anyplace expect the deep oceans.
A "Light-eater" biotic would be perfect for the dessert warfare to stand gaurd during the day while others slept during the hot periods.
Thermosynthesis would be good in the Tropics. Hot and muggy weather most of the time. Not good in place where they have Cold weather for extended periods of time though. Would be good in desserts during the day too, night might get too cold though. Some desserts are just too cold even during the day. yeah Tropics are best for "Heat-eaters"
Parisite would not be available though. For good reasons
![Wink ;)](./images/smilies/wink.gif)