It's the end of 2021, and also the last week of Vouchers Drops. For your information, Phase 2 sale will ends on January 12th 2022, and the general sale will be at on January 17th 2022 (where you can buy packs without vouchers)
Thanks to upvote from 
So overall, I spent around $13 for 2 vouchers and 2 Chaos Legion Packs ($5 for Vouchers and $8 for packs). And here are the cards that I got.
By estimation, the values of the cards is around $8.5 - $8.7 (thanks to Thaddius Brood and Gold Foil Supply Runner). From other players videos, I assume that I'm quite lucky, because some of them got less than $1 pack value, although there are some who got Legendary or even Gold Foil Legendary Cards. The cards that I got covers the price of the packs. But not the price of the vouchers.
So the question now is should we buy or wait until the General Sale ? In my opinion, if you have more capital, you should buy now. By buying a lot of packs (at least 10), the probability of getting Legendary or Gold Foiled cards are larger. And also you got a chance of getting Airdrop cards.
If you only afford less that 10 packs, my suggestion is to wait until General Sale. So you don't need to spend money on vouchers. If you have other suggestions, please comment below.
PS : here is my end of season reward. I'm on my journey to 5000 CP. (It's going to be a long journey. 3100 so far)
If you've got great cards from reward or Chaos Legion packs, you can add some salt here.
Have a nice New Years Eve everyone. Stay healthy and stay happy.
