Lurker lists are built dynamically with each game - you select models to match the Threshold point total. Ghouls are fairly inexpensive, so can generally be used for pretty much anything save scenarios that require you to field a single large "monster". The specific list you're describing could be constructed effectively around the 25-30 point range, which would be used to fight a moderately experienced Threshold squad.
Keep an eye out for our in-development Cult combat game though - I think it may prove right up your alley here.