I have no tips for blind pick, for imo blind pick is a luck game where you have no way to properly prep. However assumeing this is Draft, then you have a number of options.
Azir hates 2 types of champions.
1-people who are mobile and bursty
Why? for these champions can dodge his attacks with ease, and once they are ontop of him his only escape is his ultimate which he would prefer to not use because it is very valuable in team fights. Some azirs value the ultimate so high they will flash before useing it. (this is some, not all)
While yes his escape is very good, it takes time to set up
step 1-make a soldier
step 2-Target a direction and press Q
Step 3-Press E to dash
this set up takes about 2-4 seconds to nail down and can even be stopped by standing in the path way he wants to go, people will use this ame trick against sions who are useing ult to escape.
That means while he is trying to run away with this combo you have 2-4 seconds to hit him, which is a LOT of time
So yeah abuse people who are mobile and have good burst, examples zed, ahri, yasuo, akali.
2-He hates people who do what he does because it becomes a skill match up on who does it better
Azir hates people who are good at zoneing and pokeing who also have good wave clear. This is because it makes his advantage nullified because you are doing what he is doing. It turns the match up into a skill match up in who can zone who better, who can poke who better, who can clear waves better and more efficiently.
These would be your Viktors, your Vlads, your Xeraths, your Malzahars and morganas.
Happy climbing!~