Looking at how some people are making bases on the nether, water can be an issue, so I started this challenge. Reactors designs should run for at least one full cycle fully on air (Air set to 25-chamber_count on planner). CASUC doesn't matter but is frowned upon.
Rick's "upgrade to the starter" can run for almost 1 and a half cycle on air and almost 1.1 cycle without any cooling: http://www.talonfiremage.pwp.b…=101o101001501521s1r11r10