I had never any problems with the combat system in
Gothic II - but I have only finished it yet with the Drachenjaeger, as an Archer.

It is pretty easy to fight that way: Take your bow, find the enemy, approach him, possibly from a superior position. Look toward the enemy, press crtl and than forward (w) until he dies

BTW the fighting with sword seems to be much more complex than Morrowind with actual tactical possibilities like block, comboattack, swift left-right combinations - I had no need to use it yet as I kill every enemy at range.

Only some of this though trolls are resistent against bolts and arrows ... so use scrolls against them