Start at your buff depending on where you think their jungler is starting (Primarily bot jungle) by placing boxes soon as they're off cool down starting at exactly 45 seconds to get 4 boxes up in time. Place them behind the buff so they turn around and you can utilize your passive. Then soon as your buff is dead (and the minions with it) go to the enemy jungle with a point in your Q and go into their buff to contest/steal. If they're squishy and struggle to clear the buff on high health, you should attack them over the buff and attempt a first blood with your ignite.