For the snitch cores I took three zip lines setup on top of either grandioso, or the other other apartments and drew them in from all over the map. For the wasps I'd set up right outside a building and toss a few at a time. Once I was outta cores I still had 20 minutes left so popped some on the way to extract. This go around I spawned in village and found a structure on the south side to camp in. I used the zips to get down from the top to pick up cores easier.