Hi, Shayzien is a ridiculous grind to get at the moment. 400 points for the set, with a max of 30 daily points if you do 6 tasks a day(3 before they reset, 3 after). If you did that, it would still take you roughly half a month to get full shayzien, if you didn't buy any of the other necessary items that are locked behind this joke of a shop. (I.e cooking gaunts, chaos gaunts, tome of fire).
I suggest it's removed from daily task shop, and added as a drops from Shayzien soldiers. I don't believe soldiers are in the game right now, but it wouldn't be too hard to plop in 10/20 of them at the campsite in kourend where they normally are, and add shayzien to their drop table.