Uh, AP Rune Page? Anyone? Q & A
This question has been posted in Runes
Seals: Greater Seal of Armor
Glyphs: Greater Glyph of Magic Resistance
Quintessences: Greater Quintessence of Ability Power
That's a pretty generic AP page and it reuses the defensive seals and glyphs you (hopefully) have already. You can do some other stuff like mana regen seals and AP or AP per level glyphs if you want but you might screw yourself over in some matchups (like not having MR against LeBlanc or not having armor against Pantheon).