Mega Inferno Bomb is excellent to ruin an enemy push : it can wipe out an army of minions and heavily damage several enemy champions, brutally ending any attempt to push and also giving you lots of gold. Wait for the enemy team to be as close as possible without risking to damage any turret for maximum efficiency.
Bouncing Bomb has a fast travel time meaning it is a strong tool for harass especially when combined with Short Fuse to play the hit and run game.
Satchel Charge can be used offensively too. Placing it in the middle of your lane and walking around it will make your lane opponents scared of getting too close, as you can activate it for a huge leap. Satchel Charge combined with Hexplosive Minefield is a very powerful zoning tool, and can force your enemy to walk in the direction you choose, making it easy to land a Bouncing Bomb or a Mega Inferno Bomb.
Hexplosive Minefield can choke off large portions of jungle routes which effectively deters chasing enemy champions.
Bouncing Bomb's range is greater than the enemy's vision range when thrown at maximum range with three bounces. Enemies won't be able to see the bombs until the last second, so use this to effectively land Bouncing Bomb harass at a safe distance.