Eventually I unlocked the marauder and played some.
To me the marauder is easier to play then the roque for his mobility in battle.
I just survived the orc ambush with my cornac marauder. It seems versatily offsets great equipment and health. I just had some blue leather armour and nice weaponry. Just hackin and slashing were sufficient to undo the ambush in rather drawn out fights. Obviously unstoppable was important.
I wonder whether to pick up the stealth prodigy later on. On Lvl 30 there were not enough Class Points to spend to make it worthwile.