His E combined with his W can allow him to run down a single enemy target easily. The W shield allows him to mitigate a good amount of poke as well.
His Ultimate R makes him a menace during team fights. The enemy team can’t afford to fight in closed spaces or they will definitely get chunked out by his Ultimate R.
With lots of ability haste and reduced cooldowns, he can gank so often and be all over the map. This makes him a formidable Jungler.
His lack of mobility makes him an easy target versus assassins and strong skirmishing champions.
Rumble’s effectiveness is drastically decreased when his Passive is not half-filled.
In some matchups, he will get invaded over and over again due to his weak very early game. When in these matchups, you have to sacrifice a lot to stay alive.
0 - 15 min
Get to level 3 quickly and see if you can gank overextended enemies regularly. Your E and W will come in extremely handy when ganking so ensure that you use them carefully.
Always try to keep your Resource Bar half-filled. It will allow you to deal more damage during ganks and clears which can come in extremely handy in the early game.
Once you hit level 6, you should be able to increase the frequency and efficiency of your ganks. Make sure that you don't do anything which gets you caught out during the early game.
15 - 25 min
Use your abilities to clear the minion waves quickly so your team can siege/ prevent a siege from the enemy team. If you can land poke while also pushing the minion wave, you could look for a favorable trade.
While sieging Baron or Dragon, or whenever you’re pushing the enemy under their tower, look for a pick with your abilities. If you can catch someone out of position or blow them up, you’ll be able to take the objective for free.
Your Ultimate R is really efficient during team fights so make sure that you use it in chokepoints and force the enemy to walk through them.
If the enemy is grouping, look to group with your team too. In team fights, continue to focus on the squishiest and easiest to kill high-priority targets in the backline. Your Ultimate R will help you a lot with that.
In the late game, look for picks on immobile or mispositioned enemies. Taking someone down in the late game can give you enough time to force a fight, siege an objective or take the Baron or Elder Dragon.
Flank in team fights to make getting on the enemy backline easily. Make sure you’re near your team at all times so you can get in the fight fast.
Rumble’s first major power spike is when he hits level 6. Unlocking his Ultimate R is a major power spike for Rumble.
When he purchases his first component item, his skirmishing power increases dramatically. Look for aggressive plays after you’ve got your first component item.
Rumble is a strong skirmishing champion early. Look for ganks frequently to get yourself and your team ahead.
Another point in his Ultimate R will seriously tip team fights in chokepoints into his favor. All he needs to do is time it well and drop it at the proper places.
He will now have multiple items at his disposal. This means that his damage will increase significantly, and he should have an easy time melting through enemy health bars.
Rumble's presence during mid-game fights is really fabulous. He should be able to win multiple fights just by using his Ultimate R properly.
Rumble is excellent during late-game fights as his Ultimate R and his basic abilities will all hit like a truck now, especially during team fights.
Maxing out his Ultimate R will reduce the ability's cooldown and allow him to use it frequently. It will be a deciding factor during the objective fights.
Rumble will dish out a lot of damage during this phase of the game. His ability to melt through enemy health bars will force his enemies to play defensively.