I used 75lb/ft as some lads were stripping threads at the recommended 96lb/ft, maybe put some medium locktite on if worried about them backing off .
You can use either an M10 or m12 bolt to centre the subframe on the chassis and then take them out once the 4 main bolts are torqued, hope that helps
Cool , a good tip I picked up from someone else when reassembling stuff like this for safety and piece of mind, is tip ex or highlight marker the head of each nut or bolt and the body or another part to reference off so after a month or so of driving check they haven?t moved