In this list there are so many good tools to deal with all types of aggression. These are some of the best cards to help you out.
Spirit of the Frog - Always keep this card. Even if you cant get removals in your opener you WILL find them through the frog.
Thunderhead - Just an amazing value card that is insanely good vs every single aggro match because they HAVE to trade it away.
Zap - Zap is very flexible. First of all it is a zero mana card that deals 2 damage. Its just good. It also combos well with many of your other cards. With Spirit of the frog it is a 0 mana draw a card. And paired with Zentimo or Thunderhead it can easily clear a board. Also you can play it on turn 8 with Hagatha if you need to remove something bigger.