Kebastos. At lvl 38 i done Mephisto. Alone

I must admit it took about and hour or like that of intense kiting. My hands started to hurt but i did not pause in fear of loosing the focus. Boss is really annoying with his ligthning atack skills and melee cold atacks.
This mod would be very good, it only needs some more itemizations. There are sets/rws/some uniques. But they run out of steam at lvl 20 or so. And drop is shit, so you end up using low lvl gears even at lvl 30+ fights.
Some unique bosses drop essences - you can use one essence as a ring. You can MO it with some bonuses too.
Next mission - some crazy lvl 40 challange. Same idea as LC1 in Median. Go to some town-uber filled with ranged atackers and mages. Kill them until charm drops. Charm has negative stats, but if you kill some boss, get swirlies and cube it, the negative shit is removed and you get nice charm. Problem - i can only solo one mob at the time there. So clearing whole thing to that boss will probably take few hours.