> I've been playing Murkon's Refuge on level 4 for over a day now, and still can't get past that bloody Gatekeeper.
>
> I have one Wizard of level 11 and one Sorcerer of level 11. I suppose they could keep on casting attack spells to kill the Gatekeeper and his henchmen, but all the monsters along the way use up my spell points.
>
> Can I cast Conceal in advance at the door before the Gatekeepr? Or will it only work in battle?
>
> I've found out that an easy way to gain experience and money is to go to level 2, walk to the door to the really big hall, then walk to the opposite wall and back again, killing every monster along the way. I typically have to do it once to be able to resurrect one character, and when I have more characters alive resurrecting the rest is even easier.

Your party is high level enough to be able to take him on.

Step 1: Buy 2 or 3 scrolls of great pain.
Step 2: Walk up to the gatekeeper, running away from every encounter. (You might have to run from the same encounter 3 or 4 times, if you can't get past it, try running and running and running, until you either succeed, or get a bunch of weak monsters to fight).
Step 3: First round of combat.
A) Have one or two sorceror cast conceal, that will help tremendously.
B) Have your wizard(s) and remaining sorcerors (if any) use mass attack spells to kill the gatekeeper's minions.
C) Your fighters should try to take on the minions, too.
Step 4: Second round of combat.
A) Have your party invoke their scrolls of great pain on the gatekeeper.
B) If there are any remaining, have your fighters kill off the minions.