As a mid-range Summoner, Azir's DPS and contribution to the fight is highly tied to his positioning and attack speed. He is a Quicksilver due his gameplay begin DPS-Bases instead of Burst, he needs to keep constantly attacking to deal damage, his damage can be amplified in a plethora of ways, turning him into a Blademaster easily ramps-up his damage, however, spatulas are highly difficult to come by.
On more normal comps, Azir is better off with a Rapid Firecannon and Guinsoo's Rageblade and a Karma on his side to increase his Attack-Speed for maximum efficiency and remove his downtime when he has to reposition himself to attack other units.
Spear of Shojin / Seraph's Embrace is good to keep his uptime. As for his survivability, Dragon's Claw it's just as good of an option.
Active - Emperor's Divide: Calls forth a wall of charging soliders from behind him, dealing 200 / 350 / 2000 (× SP) magic damage and slowing all enemies hit for 4 seconds. Enemies close to him are knocked back, while enemies further away are knocked up for 2 seconds.
Active - Arise!: After a 0.75 seconds of cast, Azir Summons a Sand Soldier near a random enemy that lasts 6 seconds. Sand Soldiers attack nearby enemies whenever Azir attacks, dealing 125 / 250 / 375 magic damage in a line.