Do I Need to Start Over?

So I have a party consisting of my main character, a Fighter/Thief, Minsc, Jaheira, Nalia, Yoshimo, and Aerie and we are new, between levels 7 and 11. No particularly special weapons (+1 and +2, Minsc is using a regular 2-h sword, etc.)
I started Nalia's quest and flew through it defeating everything handily. I cast hast on my main and he rifled through the treasure in the golem room before we all flew down into the cellar without so much as spitting at the golems, then we took care of the umber hulks ans the Trolls (Torag?) with no problem thanks to some tactics and cloudkill.
Now my problem is getting back out of the cellars. As far as I can tall, the only way out is back up the stairs past the golems, but they nearly one shot most of my party, and Minsc can hold out for perhaps two or three hits. In other words, impossible. None of our weapons seem to do any damage, and what spells do work against them are useless since dead spellcasters are ineffective.
I have been quicksaving so I have no real recourse to go back. Am I missing an exit in the cellar or is this game just a waste of my time at this point. I thought I might be abe to get out the way the umberhulks tunneled in, but no such luck. It is surprising that there would be such a one-way gate to certain death introduced so early in the game since Nalia basically begs you to help her right at the beginning.
Anyway, just looking to get out of this hellhole. I don't need strategies at dealing with the golems from the front side, they are already riled up. I just want to get out.
I started Nalia's quest and flew through it defeating everything handily. I cast hast on my main and he rifled through the treasure in the golem room before we all flew down into the cellar without so much as spitting at the golems, then we took care of the umber hulks ans the Trolls (Torag?) with no problem thanks to some tactics and cloudkill.
Now my problem is getting back out of the cellars. As far as I can tall, the only way out is back up the stairs past the golems, but they nearly one shot most of my party, and Minsc can hold out for perhaps two or three hits. In other words, impossible. None of our weapons seem to do any damage, and what spells do work against them are useless since dead spellcasters are ineffective.
I have been quicksaving so I have no real recourse to go back. Am I missing an exit in the cellar or is this game just a waste of my time at this point. I thought I might be abe to get out the way the umberhulks tunneled in, but no such luck. It is surprising that there would be such a one-way gate to certain death introduced so early in the game since Nalia basically begs you to help her right at the beginning.
Anyway, just looking to get out of this hellhole. I don't need strategies at dealing with the golems from the front side, they are already riled up. I just want to get out.
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I finally came up with a simple solution though it took a few tries to succeed without fatalities. When I came back up the stairs there were a couple smaller golems immediately ready to attack. I set the game to pause when an enemy is sighted. At the bottom of the stairs I simply caste Haste. then at the top of the stairs, when all was paused, I carefully, one by one, sent each character depending on how they were positioned out of the room. This had to be done carefully because the pathing mainly just had them bumbling around while the golems smashed them. It was like untangling a knot.
Then when they were all basically clear, I sent them all back down to the main hall, golems right on our heels.
Thanks again everyone. I think I will stay in Amn for a while.