Interesting read guys and maybe gals but how the hell did you beat it?

The cass would like details as i am at this stage of the game now and in order for me to progress i got to beat em, i've tried but got anialated so to speak, do i cast and magicks on it? ive tried gung ho but that never worked.

My characters are mainly in the 15-17 level.

All help is welcome

Thanks in advance.