I didn't ignore your point. And runes are for whatever you use them. I use part for early game, part for late game. It's very rare that an Orianna that farms well doesn't reach level 18 before the game is over, that's why scaling runes make alot of sense for her. In my comment, I'm showing you that other scaling runes can work well.

You ignored my point completely. Runes are for early game power; scaling MR glyphs are useful because mages peak at level 9.

http://leagueoflegends.wikia.com/wiki/Gold_efficiency

Scaling mana regen quint at level 18 provides 4.32 mana regen / 5 seconds, which is the equivalent of 260 gold. No other rune in the game compares to this gold value, which makes it much more efficient to buy anything else you might want to get [like ability power].

Same argument goes for scaling ability power glyphs, if you run the numbers.

-1 for the same reasons as Laggermeister. Also, I don't think scaling runes are very good at all, with the exception of scaling MR. Runes are generally for more early-game power, but scaling MR glyphs work because they are superior to flat MR glyphs at level 9, when many mages hit their first peak.

That's something I can answer to. The absolute bonuses of the runes are important when they are flat, not when they are scaling runes. That's why the seals and marks are not split. Glyphs on the other hand are split, and I explain the guide why [it has to do with Orianna's initial MR values]. Scaling AP glyphs are very cost efficient, that's why I include them, but they can be traded for scaling MR glyphs or vice versa, depending on how offensive you want to be. Same goes for the quints. This is a general setup for a general game, clearly meant to apply to a large amount of compositions. You obviously don't need that much armor if you're laning against an ap mid and an ap-based jungler. So you could swap your seals for scaling mana regen seals, and put some more penetration in the quints. No part of the rune section is written in stone.
That's about the runes.

About the masteries, you can change points between Expanded Mind and Mastermind, but it's really a nuance. I personally like the larger mana pool in the early levels.

And about DFG - if you read the item section you would know that I wrote that it is the most exchangeable item in the build and provided 5 different scenarios where it should be swapped for another item. In fact, most of the time it isn't part of my build, but same as with the runes, I tried to make a general case scenario. It's still a good item for late in the game because it provides the ability to deal with tanks through %HP damage, which Orianna only receives from her Liandry's. It gives you a great amount of AP and extra CDR which is very important to her. Many people think that you should only get DFG if you plan to assassinate someone, but that, in my opinion, is not the most important use of this item. For assassination tools, read my comments on lich bane.

About being squishy. Next time you play Orianna, try to count the number of times you auto-attack during a teamfight. After your initial combo, your only sustained damage is command: attack and your auto-attacks. Unless you are running, which means you are losing the game anyway, you should be auto-attacking as much as possible. Even if you get only 3 auto-attacks in a teamfight before you have to retreat, with Nashor's tooth, that is still the equivalent of an extra ability dealing 105% AP. You'd certainly like that as part of your combo.

You want an explanation? I'll give you an explanation.

RUNES: Never split your runes three ways like that. You'll gain no benefit because the absolute bonuses of the runes are very small.

MASTERIES: Don't take Expanded Mind .

ITEMS: Vynertje already mentioned DFG is bad. So is Nashor's Tooth. You are too squishy to stand and lob autoattacks at enemies - which also brings me to the fact that your item build lacks defense.

I think I said twice in the guide that I wanted feedback. Maybe I should have wrote "constructive feedback". Your comment, like the first comment, doesn't offer feedback, it offers judgement, which is useless to me. That's why it can't be taken seriously. If you want your comment to be taken seriously, you have to provide an explanation for your judgement.

I've already downvoted, up to you if you want to take me seriously or not. If you do, just ask why your runes, masteries and items are wrong.

Saw that you wrote a guide titled "Ten Commandments for writing a guide".
Here's one commandment for writing a comment: if you make a judgement call, explain yourself, or you won't be taken seriously.

Wrong runes, wrong masteries, wrong items. Looks like you're on the wrong ball, pal.

Title change done. What do you think is not detailed enough?

Guide has potential, just detail it more a bit and if you can, please change the name of the guide.
"Orianna Guide" isn't such an interesting title to an interesting guide.
+1