Simplest method would simply be to separate parent 75 into a separate getResources call.
Do the parents listed above have a common identifier (tv value or ancestory) that would allow you to gather them via a getResources call? If so, you could place a new getResources call inside the template you use for the initial call and could then order the parents exactly as you wish using &sortby=`FIELD(modResource.id, 91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,75 )` in the initial call.