Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
I'm going to make this short sweet and to the point.
The reason why I went attack speed and critical strike is so you can be the carry of the team.
With this build you will see people drop like flies!
With the 156% attack speed your basic attack is one of your best friends.
Kog is great to lane with a stunner. Get your lane mate to hide and wait for the enemy to come. Start of your gank with him stunning the enemy and you using the Bio-Arcane Barrage. This will give you more range as well as damage to get your first kill.
Try to use your void ooze and the living artillery to get the most damage in before you yourself gets there.
Make sure you use your living artillery spell in front of running enemies so it does maximum damage.
So have fun and do your best!