Actually, this is just a sample deck. There is no need to follow it tightly. Though this deck do need some good trap cards to protect themselves. Draining Shield (SR) can be one, but it is SR though. You can actually go for the cheaper alternatives listed here. :)
From the same person above, Windstorm can be a card for defensive purposes as well!
Lastly, Fragrance Storm from Card Trader can help you to get cards faster, usually using it on Rose Lover (for her effect), or Aromage Jasmine. Maybe the opponent's Sylvan Tree occasionally if you survive!
There are options for every deck. So build whatever you feel like the best! :)
Honestly, you should pull for Ultimate Providence and Draining Shield instead. While Wall of Disruption is good and all, Ultimate Providence is a more versatile tech that can stack your graveyard while protecting yourself from whatever and Draining Shield has so much synergy with Aromages.
Be glad you didnt run to me the other day poor sucker ran in to me with rocket soldier and 3 spikeshield with chains for a starting hand 10100 damage...