You're at the ending already in five days? I'm going to have to agree with Joram and the others - I think you're rushing through this game too fast.
Four actually, no gaming at christmas, have to have quality time with the family, after all Christmas is about only time in the year everyone are sitting on the same table. I startet my second playthrought now and game feels a whole lot different when you take your time with all the side quest, i was able to take on Jagon on hard difficulty because i outlevelled him by 3 level.
I also noticed some goblins that are considerable lower than you are, they cannot score no damage at all i always thought that would be NPC only feature, i guess my issue at the first playthrough was that i always were about 2-3 level lower than anything i was fighting. Didint notice that on trash mobs but bosses were nightmare.