The guy who said he got them to 6 each is a liar if he didn't do it with some sort of editing program. The combined total levels of the guiding lands must equal or be lower than 18. So practically, you could have 2 areas at level 7, one area at level 3, and one area at level 1. Having four at level 6 is literally impossible. Not to mention now that the volcanic update has come for pc, assuming they didn't increase level cap, it would now be 7,7,2,1,1.