Was looking for the answer to this question, couldn't find it, then realised how to answer it.
All eight children need to be in play for Cursed children scenario (assumption).
The Macho family if used need to replace complete families either 1,1,1,1 or 1,1,2, or 2,2, or 3,1.
Adding in the Macho family means that the only legal families (following assumption above) that can be substituted are: Long, Teng, Weng (single members) and Sheng, Wu (2 Family members)
Therefore to use the Macho family in the Cursed Children Scenario you can either remove Sheng and Wu, or either Sheng or Wu and two from either Long, Teng or Weng.