The Viiper deck after the executioner buff is better than ever. The Exe has the range of the bowler now and you can use the tornado to line up everything. If you ever have problems breaking through with your hog rider you can switch to rocket as your win condition.
The Hog Rider is the main win condition, use your spells to try to get him to the tower.
The rocket is the secondary win condition, if you can't break through with the hog rider try cycling rockets once you get to double/triple elixir time.
The executioner can be used to get damage on the counter push as well. The range of the ax through is so far that it can hit the tower after crossing the bridge, use your tornado in combo with him to get maximum value.
In the early stage of the game cyle hog riders and play solid defense. Try to get a king tower activation even if it means you have to take a bit of damage.
In the later stages of the game do not be afraid to cycle some rockets to finish it out. Just make sure you are up in elixir and your opponent doesn't have a push coming down the lane.