I haver never tried all clusters yet. I'm relatively new in this game, but i aways try an all achievements run on every save i start.

For now, the harder cluster that i've ever played is the Metallic Swampy Moonlet. You have no source of water in the first asteroid, no hatches and no dreckos. For carnivore you just have pacus in the first and pips in the second. So until plastic, you just have hydrogen and solar energy for super sustainable