After Elinia you have to get a key from Demonis (if you weren't there already) first with this key you can enter Haas Labyrinth.
Murlock is quite plain map with dozens of enemy units and one main quest huge fight leading to last final battle.
If you feel you could handle some more fights - buy all artefacts that have to be suppressed and fight the guardians, also try to wear most such artefacts to re-suppress them - having so more fights.
Level 25 is fine if you just defeated Korador... Labyrinth is quite resourceful for experience
