I'll give you some tips that I used with Azir. I started playing him when I was about Silver 3, now I'm at Plat 5 and he's my most played champion. I have over 130k mastery points with him. So, I've learned a thing or two.
First off let's get this part straight.
is extremely good on Azir if you know what you're doing. How many times have you been in lane and gotten your opponent to 100- hp for them to just walk out of your soldier range and survive? Solo queue is about taking your opponent by the balls and never letting go. If you just try to passive farm for the first 20 minutes while you get your items, well guess what? They are doing the same. You want them to fear even getting near to try to cs. Ignite gives you kill pressure and can allow you to snowball if done right. Something I've seen a lot of Azirs do is just put down their soldier and then instantly q the solider to the enemy champion to poke... you NEVER do that unless its for a kill. Your q costs about twice as much as your w does. So this is what you do. Walk up to the creep wave and if you see the enemy get even near you to cs, drop a soldier right ontop of them and get a few autos on them. Then if they try to retreat follow up with a q and boom half their hp is gone. Do this every single time they try to farm and you will win lane pretty easy once you get the hang of it.
Next is build path. There are a ton of ways to build Azir and to be honest he does well with almost every AP item. But the thing you DO NOT want to do is rush these 2 items
. I'll explain why, Azir has a weak early game and the build path of these 2 items consist of
and
. These give you literately 0 offensive pressure in lane except a small attack speed boost that you would get with your w anyways. You become basically useless and can't even make use of the extra attack speed until
is done. Let's see how much that would cost.
is 3k gold, you would need 2 dorans rings for mana sustain (800 gold), and
is also 3k gold. Now you need boots
. That's 7.9k gold and you only have just over 200 AP and 0 mana sustain outside of dorans rings that you need to eventually sell anyways. This is a horrible build path and that build only has a 40% win rate. Now let's see what effective items we could buy for 7.8k gold.
2.3k gold, you only need 1 dorans ring now (400 gold),
1100 gold,
3000 gold. The total cost for this build path is 6.8k gold. You still have 1100 gold left over, that's almost 1/3 of a
and do tons of more dmg than the
build path. You don't go through any weak item purchases like
.
One important thing to understand is yes,
is the strongest LATE GAME build for Azir. There is no doubt about that. But consider this.. Azir only wins 30% of his games that are under 25 minutes. Here are the stats http://champion.gg/champion/Azir. On average 70% of the games won't even go past the 25 minute mark, so by going this weak early game build and building for the late game there's no guarantee you'll even make it there. Pro players do go this build because they are experienced at stalling out a game and farming, without losing towers and having lanes snowball all over the place.
This is solo queue we are talking about. Where teams surrender at the 20 minute mark and you have to try your hardest to make an impact on the game. If you are playing Azir and the enemy team is playing
. By the time you have your
, she could already have
for almost the same price and start snowballing the game while you are still climbing out of your extremely weak early game and barely have 200 AP by the 25 minute mark.
This is the build I recommend you to try because I've seen success with it and you may like it as well:

If the game still isn't over by now sell
for
. Or you can skip
all together if they don't have any spells / hard engage you need to avoid and just go
.
Before
was buffed by 20 AP and the AS was reduced by 10% is was considered by most a bad buy because it was a horrible build path for early game. Azir gets more passive AS from his W than from his old passive. So, the item is still mediocre on him in my opinion for solo queue.