HOW are you supposed to build him via runes/masteries/items? It just makes no sense now to have 
and
when its just a useless 30% more CDR. Sure one can argue the other bonuses of these items are ok to have them but with he rework i didnt feel the same power from before his rework. It feels like he does no dmg even with 
and
now. Thoughts? help?
Riot wanted to eliminate Ryze's potential to be tanky through builds, so making him getting that natural 30% CDR seriously restricted off a lot of tank items, such as . He is now a proper actual mage champ, who now prioritize AP builds more than Mana builds. This is the one point where I think Riot is telling us to stop playing Ryze top.
His build path is totally different now.
One way of looking at it is "Ryze has 30% CDR now, I can't build CDR items!"
The other way of looking at it is "Ryze has 30% CDR now, I don't have to build CDR items!"
as core then either 
for tank or 
for damage AND tank. You don't even need Void staff because of how his E works
Try playing support. All of our items give CDR. Whether we need it or not.
I know how you feel man, but you best save yer breath.
The cass community had the same issue with her rework. Riot gave her a crap ton of free cdr screwing with her build path too, but saw fit to leave her as is, despite the constant negative feedback.
tbh, free cdr (that totals more than 10%) is a terrible stat to put on a champ's kit, and serves as nothing more than a nerf to that champ by reducing the gold efficiency of their most common build paths, or by wasting their power budget with a stat no one benefits from if using said build path.
Items still good on ryze in no particular order (some are situational) ...
+ boots of your choice.
Ryze is actually much tankier now than his previous iteration. The shield from his passive is up frequently, especially at higher CDR. You can even stack it before engaging in a fight.
His damage is lower to compensate for the extra tankiness in his kit. You can get around that with muramana right now though, not sure if they'll patch that out... With his Q not being targeted stacking a tear is super easy now too. He can hit a muramana spike much faster than most champions.
So get the 10% from masteries, and either go tanky or try a caster build. Lich Bane gives mana for casters, Righteous Glory is nice for tanks. As weird as it feels to change up his build path, trading in those cdr items for a randuins or banshees is by no means bad either.
Personally, I run 2/9/19 on masteries getting all the CDR from that as I can. I run Magic Pen reds, a mix of armor and armor/lvl yellows, 3 CDR blues and the rest scaling MR, and also MS Quints. I start the game with 10 CDR.
Itemization wise, RoA and Seraph's are still pretty core on him. After those are completed or on the way, Luden's and Deatcap are good choices as his AP ratios are decent when you are spitting out Q's every other spell with your passive. 3 .55 ratios in 2 1.5 seconds is a 1.65 AP. Void staff is always strong against high MR targets. If you feel like you need resistances, Abyssal and Banshee's are really good MR options. As far as Armor is concerned, you can always still get FH, but I think now you have better options in Randuin's and Thornmail. Thornmail will benefit from Magic Pen, so I like the item on Ryze. Getting a second RoA is fun and still effective. And Guardian Angel is a good defensive item for multiple damage types.
On a side note, Tear stacks REALLY fast on the new Ryze. So I don't see why we couldn't see the old Athene build: 
:P
Anyway. That's what I think about how you should build Ryze. I love that they give him CDR as it really opens up his build path now. He used to have 3 core items and it has been narrowed down to 2, which allows for more creativity from those who play him. Ryze can actually do well against high magic damage teams and lane opponents now because he doesn't have to build FH (only good against AD opponents). Play around with Ryze and see what you like. He has more options now. Good luck and have fun. Peace.
He is an actual mage now because they nerfed his mana ratios pretty substantially and buffed his AP ratios, so you should look to build him with 10% CDR in masteries (like 9-0-21, or as someone else suggested, 11-0-19), and then build tear>RoA>Lich bane/Ludens/Zhonya's>Void staff>Rabbadon's>+boots of choice (usually source shoes).
he isn't really as much of a tank as he used to be, and playing him tanky like you might be used to will be much less effective.
i still build . maybe a 
if there is no need for a frozen heart (like a corki ADC with 4 ap champions).
you have to stack his passive and his ult to get damage now. if you pop the ult to chase someone down for a prison, you lose a lot of damage. however, his damage got stupidly increased if you get a rotation of spells in, pop the passive, then pop the ult - slamming your face against the keyboard gives you at least 3 rotations of spells. if you actually repeat "q-w-q-e" you could pump out a couple more rotations and even run out of mana with a .
As for , or an ap item might be a suitable replacement, though you lose out on the increased healing. I really don't know where to go with the mr route tbh.
I feel like you could still build on despite the wasted 10-15% cdr. It seems less attractive yeah but the other stats can be well worth it (kind of like how 
likes 
). You still get all that mana and armor which is really good for ryze! Plus since the cdr from r scales up (10%/20%/30%) the cdr isn't going to waste if you complete before lvl 16 assuming no substantial cdr from your runes/masteries. Usually on old you would finish as your 2nd or 3rd item, and as a top laner that ought to be before 16 unless you are just really bad at cs/ losing pretttttty hard.
TLDR: Seems less attractive but is still actually good just like is good on
This boggles the mind.
Why would Riot give so much free CDR on any champ? It restricts build options too much.
The only reason that I could see for adding free CDR is if Ryze would not have been balanceable so that CDR focused builds could be balanced without making damage/mana oriented builds unsatisfying, but Ryze's new kit is specifically tuned so that Ryze's comboes are independent of his cooldown reduction when he has his passive up. It just doesn't make sense.
