Talk:Archangel's Staff/@comment-84.251.188.117-20120128134148

If you have full build (5 AA staves + rabadon) and mana/level runes, you get more AP than you would get with AP/level runes. With full AP/level runes you get around 80-90 AP, with full mana/level runes you get +120 AP if you have all 5 staves. Plus, the mana/level runes fit well for Blitzcrank, Singed and Ryze.