I've found a couple cool low pressure high oxygen worlds, RS 8474-253-8-15053162-512 3, RSC 8474-1192-4-2250-24 3, RS 8474-1792-8-9448635-211 4, and HIP 11337 5.4. Although I am using a couple visual mods, a bunch of ship mods, and a couple planet addition mod, but I don't think those would change ...