I have been grinding 8 hrs straight in ever frost twice, with normal, advanced, and spoils buff. At first I only have 5, while the next one only have 6 Voidsent Eye. Not even a single accessory, and trash loots gained in an 8 hour grind can only be sold for a little 9 to 12 Billion silver. Please increase Voidsent Eye and Trash loot drop rate, or add a guaranteed Voidsent Eye drop for at least every 3 hours or maybe every 30,000 killed mobs. Citrus Tea had weekly purchase is limited while we get 20 minutes free every day, it takes upto 3 weeks to get a full 9 hrs. Yet this is only what we can get. 

Also include more reward drops in Sherekhan, and increase trash loot drops, grinding for only a single material seems like not worth the time.