Hm.
[hider=Working things out...]Best to start by looking at the HP of people at equivalent levels. Hjalmar's a DPS class, so low health/high damage therefore his 14000 HP would be below avergage for a player/average MOB with a level in the mid 20s, so let's say average HP is... 20000 for a level 25 general... thing. The average fight using purely autoattack at this level would take (going by WoW for basic examples) something in the region of 10-15 seconds, so... 1334-2000 DPS approx. Assuming attack speed of 1 second... 1500-1750?[/hider]
. . . which seems way OP for a level 24, so let's go with 650-750.