This is one thing that bummed me out in this game. Could not go back and redo any bosses for item farming, not that it was really needed until the end of act 1, just surprised me that you can not do that.

I had the same issue. I then discovered that pure magic characters is a bit weak currently, so I did a respec to a more melee focused char based on some gear that I had. Then it started being a bit easier and I managed to farm some even better gear from just doing the expeditions. Its not really important if you complete them, just farm untill you die and then redo. I'm currently up to fighting lvl 39, which becomes a bit too hard before I get better gear. ;)

guys on youtube beating shit on 30 autopilote, same for me, change ur skills its crucial at this point in time, u go mage take aether ray, u go knight take the spinnign axe etc, its not that hard.

Hi

It is true that the mode "S.O.F" is much harder.
I play long-ranged and it's impossible for me to farm alone (i got 25% chance to dodging an attack but if I take 2 or 3 shot... I'm dead)
I even thought that the mode was made first to play multi.

(I'm French so sorry for my English...)