The best AP rune page is:
Magic Penetration Marks
AP per level Seals
AP per level Glyphs
AP flat Quntessences
These works for any AP carry whatsoever.
CDR is easily obtained trough items depending on the Champion played. Champions that are not Nukers like Orianna or Viktor can perfectly behave using Ionian Boots, while Fiendish Codex provides 3 separate ways to get all the remaining CDR. Nukers can behave without any CDR, more concerned with Mpen/MRred and AP.
In Ranked games it's the usual practice to give up the Blue Buff to the team's AP carry, thus both CDR and mana regen becomes meaningless. Both HPreg and MPreg runes are very weak, any AP carry can behave without them easily, taking Meki as laning item if they're playing safe, or with Doran's Ring if they prefer early agression. CDR runes are mostly messing up the item build required to get CDR to the hard cap 40% and making little difference in their dedicated game phase, while you might waste some gold-value by buying CDR item which exceeds that hard cap as result. CDR masteries can provide either 4% or 10% starting CDR which is quite enough until further items are bought.
Finally, having extra 20 AP at lvl1 and 50 ap on lvl18 barely beaten by any alternatives. I'm playing all my AP carries (Swain, Xerath, Viktor, Orianna) using that only build with different masteries, and I can barely imagine any viable alternative.