I keep farming Yak Milk and the only way to get them is from the level 51 Wooly Yak but it seems that they are incredibly rare as in 3 milk in 10 minutes rare.

Are people experiencing this with their monster material farming?

Is it about time SE puts Treasure Hunter feature in? Because the amount of materials needed for these recipes is quite abundant and the time spent farming this is grossly disproportionate in terms of simple item collection.