I made it throgh the game with a normal party with my Cleric \ Ranger using the cursed beserking morning star from Durlags Tower.

Just make sure your PCs dont get too close and the person using the weapon will just attack enemies.

Most battles ended with Yeslick being chased around in circles by someone with the boots of the Cheatah on though.

The Morningstar is all right--IF you're a Tank who never wants to use any other weapons and you don't have the Halm of Balduran yet. It'd be an okay weapon for your second Tank--if your second Tank was also melee-only.

I sold it right away. Didn´t fit into my missile weapons tactic, and the benefits of it are often smaller than the woes it causes.