Azir feels terrible to play ever since the rework. Like any champion, you can still win with him though.
He's in a weird spot, if you go for Luden's you have mana but no atk speed which feels clunky to play. You can fix this by maxing W but then your real damage (Q) is left at level 1. If you go Nashor you easily run out of mana and can't waveclear or get into any game deciding fights.
If you get both then you miss out on earlier penetration items
or any other situationals 
Before, if you got past the early and mid game you could do what you want late. But now there's nothing to look forward to in the late game since his range is so low.
I personally wouldn't recommend him to anyone.