Try to think of Sand Soldiers as fire. Don't stand in the fire.
Azir relies on his soldiers to deal damage and can only move them so often. Try to capitalize on windows of time when his soldiers are stationary.
Azir has immense damage over a prolonged amount of time but lacks the upfront burst of other mages. Try to burst him out before he can turn a confrontation around.
The stats shown here feature several critical Senna versus Azir counter stats that can help us appreciate the differences between the two. As an example, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Azir’s KDA ratio of NaN, demonstrating that Senna may be more central to her team's team fighting capacity than Azir. This observation is in large part a result of the differences in assists.
Senna normally has a similar longest killing spree as her counter does. Typically, she takes a similar amount of damage to Azir. This is usually reflective of different amounts of tankyness, but it can also imply that the one champ has less agility and thus is not able to kite away from additional harm when poked or engaged.
Both League of Legends champs are great champions. Both champs have their pros and cons. In League's current meta, Senna usually fairs equally well when facing off against Azir, with a 50.9% win rate. Therefore, Senna makes an ok counter to Azir.
While Senna does have a higher win rate compared to Azir, when on opposite teams, Senna also has a lower difficulty level that makes her a less time consuming character to pick up and master. You still need to be cautious when picking Senna into Aziras her relative depth means you may not be able to reach her full potential without a lot of practice beforehand.
Moreover, Senna also has a good amount of CC and other utility, a similar amount to Azir. This often makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Senna vs Azir matchups, Senna is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your teammates during teamfights.
Senna is a decent counter to Azir. You will do well by focussing your tactics on keeping up your gold income and clearing objectives. If you are able to do that, you should do very well as Senna against Azir.
To learn all of the intricacies of Senna in order to counter Azir during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tricks and insights into this matchup. If you listen to the build and stats presented here, you will grow your win rate by a lot and be closer to League of Legends pro players.
Senna most often accumulates less CS relative to Azir. Champs who typically don't acquire many minion kills typically don't have to have much CS to be valuable teammates, such as support champions. These kinds of champions are able to scale properly off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically require several high cost items to be effective. In either situation, try to do better than the values shown here to do well.
The best items to use in your Senna versus Azir build include Rapid Firecannon, Bloodsong, and Voltaic Cyclosword. When Senna used at least these three items in her build, she did a lot better countering Azir than with many other common counter builds. In fact, Senna boasted an average winrate of 50.9% when playing against Azir with this build.
To have the highest chance of annihilating Azir as Senna, you should take the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Bone Plating, and Revitalize runes from the Precision and Resolve rune sets. Out of all the runes players picked for Senna vs Azir face-offs, this order of runes yielded the greatest win rate. Moreover, these runes gave a 50.9% win rate overall.
By default, tips, stats, and builds on how to beat Azir as Senna are presented for all skill levels combined. If you would like to narrow the statistics and builds to a specific player tier, you can use the selection menu earlier on the page.