Hard to say, I had to buy some mats to reach 499 (below 1kk), and then expert exam: about 20kk with some mats already in bag. I used event time and event boost item to get it there. From there I used Tiamaranta Award (hint from Thar) to get it to 510, took about hour with few runs to broker and WH. From 500 I've used special table in Oriel and event item (no event buff thou). Made about 60-70 awards.