Powerball can be used as an effective escape mechanism.
Tremors and Defensive Ball Curl can be used late in the game to obliterate towers. If you're bogged down in a team fight, it is often valuable to break off and attack the buildings.
Using taunt on a champion by your tower can cause the tower to attack your enemy.
The stats provided here feature several important Rammus against Senna matchup stats that may help you understand the differences between this set of champs. As an example, Rammus’s KDA ratio ([kills + assists] / deaths) of NaN is more than Senna’s KDA ratio of NaN, highlighting that Rammus may be more central to his team's team fighting effectiveness than Senna..
Rammus normally has a similar longest killing spree as his opponent does. Typically, he receives more damage than Senna. This often reflects different amounts of tankyness, yet it can also hint that the one champ has less agility and thus is not able to flee from further damage when engaged or poked.
Both League champions are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Rammus usually wins when trying to fight Senna, with a 52.6% win rate. Thus, Rammus makes a good counter for Senna.
While Rammus does have a higher winrate than Senna, when on opposite teams, Rammus also has a lower difficulty level that makes him a less complex character to pick up and master. You don't need to be too worried when picking Rammus into Senna.
Moreover, Rammus also has a great amount of CC and other utility, a similar amount to Senna. This makes her just as valuable during teamfights, especially when trying to counter champions with a ton of burst damage.
While there isn't a single best champion for every situation in League of Legends, in Rammus vs Senna matchups, Rammus is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your team members during late stage team fights.
Rammus is an above average counter for Senna. You will do well by focussing your play on keeping up your gold income and taking out objectives. If you can do that, you should be able to stand on your own as Rammus against Senna.
If you would like to truly master Rammus to counter Senna during both the lane and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tips and tricks for this matchup. If you listen to the build and tips displayed here, you will increase your win rate by a lot and be closer to League of Legends pro players.
Rammus often picks up less CS relative to Senna. Champs who on average don't get many minion kills typically don't have to have much CS to be valuable teammates, such as supports. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually require many items to be effective. In either situation, try to surpass the values displayed on this page to do well.
The ideal items to use in your Rammus versus Senna build include Thornmail, Randuin's Omen, and Dead Man's Plate. When Rammus incorporated at least these three pieces in his build, he performed much better against Senna than with many other common item sets. In fact, Rammus boasted an average win rate of 52.6% when countering Senna with this counter build.
To have the highest chance of coming out on top against Senna as Rammus, Rammus players should equip the Aftershock, Font of Life, Conditioning, Unflinching, Triumph, and Legend: Alacrity runes from the Resolve and Precision rune sets. Of all the runes players chose for Rammus vs Senna matchups, this set of runes yielded the best win rate. In fact, these runes gave a 52.6% winrate overall.
If you need to see Rammus vs Senna tips and builds for a a distinct player tier, feel free to choose one from the selection menu above. If viewing for the first time, the stats and build suggestions shown are calculated using all games with data with these champions.