I can agree with that guide (except that I always start the SOP quest and then I get to 42 and then go to trascendent to continue, when I finish everything im 51 50% or something like that), besides that my SE is 65 with a +7 aden weapon, my sylph got lucky and got a +10 (I dont use that character anymore since sylphs require a lot of attack speed that I cannot afford at the time), I got a tyrant 59 with +7 fists, a necromancer 60 with a +9, 2 kamaels with +7 bows, all my characters are low/mid 60 without spending any money (and for the most part I will not spend anything, if I can). The thing with essence/aden is to know how to optimize exp zones and sayha's. The real problem starts when you run out of soulshots.
btw: 6 days to reach 60? really? I spend 2 days on each of my characters to reach 60 (some of them even less time since I got lucky to get a couple of 100kk lamps :P)