Pre EoF, we had nightfalls that reliable dropped most of these resources. Even ritual playlist would regularly drops cores and prisms, but now we have no reliable way to earn these resources besides 4 gunsmith bounties and farming master lost sectors which is also unreliable and offers nothing else of value under the new system. This is especially bad given how expensive it is to masterwork T4 &5 weapons and armor. Its sad when I have to wait for an event,just to stock up on resources by using the event currency to buy them through the event store.