Currently in town and went into a house where I met 2 doom guards, 2 invisible stalkers and some other monsters. I loose this battle again and again. A little help would be ok.

Who is in your party, and roughly what are their levels? Summons will help out a lot here.

Yes, summons and spells like grease, hold and entangle ensure you only fight a few at a time, rather than all of them. Massed missile fire is the best way of taking them out, especially if they can still fight back.
Tactics mainly depend on who's in your party

It might be of help to know the fact that it isn't a party required area. Which means you don't have to send all of your party members inside at the same time. So you can heal or cast protection spells outside if you're wounded too badly.

Some of those big bad Undead may start out Invisible, but none of them can see the Invisible.

Backstab ahoy!

Okay thanks.

My party:
Minsc
Khalid
Jaheira
Kivan
Bran (can't remember)
+ I play as a mage/thief

All at level 6-7.

Summons are killed very fast. Hardly no help. I'll try hold, entangle etc.

Protection From Evil 10' Radius, Haste, slaughter. Worked for me.

No fair asking how many times I reloaded. I lost count, anyway.

Go to the Sorcerous Sundries shop and buy some wands (heaven for cleric frost/fire (A's scorcher) for your mage/thief) - they do nice damage [img]smile.gif[/img]

Don't need to go there. I have more than enough wands.