I usually place 1 box defensively then at the point of the game 40sec away from camps spawning I start dropping boxes on raptors until I have 3. Move to red then take krugs (smite krugs). Look for gank mid or in the lane closest. If you are purple ganking top and invading enemy jungle are good ideas. Try to get both crabs or put enough pressure on a lane to have your laner assist you in contesting crab vs enemy jungle.

From there just gank anytime you see a lane pushed up a bit and farm while you wait for lanes to push. Invade the enemy if they cant kill you and set up vision for your team while stealing enemy camps. Keeping track of enemy jungle is how you win games and the team gets an advantage. Take drag lv 6 or with your team at every opportunity. Soul is a big part of the game at the moment and you dont want the enemies getting it.