Still trying to master the berserk class. Currently, I go full stunning hit, full berserk, 1 lvl in rush, get some healing runes, full weapon focus and armour mastery. But I usually lack concentration to make calculated moves after lvl 10+ due to my current surroundings and go berserk on everything.
Also, I keep going towards the east. I know it's a bad idea since the mobs there are lvl 20+, but my berserker kills them no problem. Just need to keep an eye on health. Also, beyond level 10, I get bloodthirst line, perhaps shouts will be better.
Edit : Also tried alchemist once. While resting, alchemist drowned and only golem was left.
Edit 2 : Also, ****ing escort quests. They are worth doing because they have good solid rewards, but for the love of god, if you are going to wander off and get killed anyway, why ask me for an escort?