8 Cob Strategy by MasterArceus246

This is the strategy I've been using. It has been very stable. It can withstand 2 Cob Cannons and 4 Gloom Shrooms destroyed in the same level, even with Giga-Gargantuars and Football Zombies, as long as you bring Doom-Shroom and Jalapeno.

(Note: The Twin Sunflower is supposed to be Pumpkined.)

How to Use
This strategy follows a 2-2-2-2 Cob rotation. If you time Cobs correctly, you shouldn't have any trouble with zombies. Spikerock is completely optional, and acts as a safety net, authough one thing to consider when using it is that Giga-Gargantuars can get 1 or 2 swings off if you use it, while they will be obliterated without any damage if you don't use it.

Always bring Doom-Shroom, Jalapeno, and Squash. Doom-Shroom + Jalapeno can substitute for a round of Cob blasts, which is important in the event Cob Cannons are eaten/smashed. Squash is good for picking off a few Giga-Gargantuars smashing your Spikerocks and are useful if you mess up Cob timing, potentially saving a Cob Cannon.

Strengths

 * Full Cob Rotation
 * 8 Twin Sunflowers can sustain extremely heavy losses, like I mentioned above.
 * Digger Zombies are taken out quickly

Weaknesses

 * Bungee Zombies must be hit by Cob Cannons (this problem can be solved by placing Umbrella Leafs)
 * Imps on Column 4 from the left are dangerous and they can heavily damage Pumpkins.

Pros:

 * You don't need to worry about Giga-Gargantuars and Zombonis damaging your Spikerocks

Cons

 * There is no buffer if you make mistakes with Cob timing.

Pros

 * Almost completely immune to Bungee zombies

Cons

 * 2 less Twin Sunflowers
 * The column 6 pool Twin Sunflowers are still under the risk of Bungee Zombies (can be solved by 1 more Umbrella Leaf, although that limits this to 5 Twin Sunflowers)