Well thank you very much i will take that in consideration and will edit the build thanks man.

i think so, but as i sey, artangels, rabandons, and 4 rod of ages is the ULTIMATE damage build for ryze, i dont think a manamune is enouf mana to make it bether, also, the chanse for maxing bout of the stafs (artangels and manamune) is werry smal, (or, it wil take alot of time), a rod of ages are ready in 10 minute, but not unusable when its bought eather

thanks for all this info.
i will put more work into the build.
and you think manamune would help if added?

ryze have terible AP spels, its the mana thats important, 616 AP is around 1000 damage on a spell combo, 4000 mana is arond 2400, so you see, its the mana that are important, 1 rabandens can be ok, but only becouse you shoud have ALOT of mana, a artangels, and get the 30% bonus (rod of ages are the best mana item, and give 80 AP)
4x rod og ages = 725 x 4 mana = 2900 mana
+ 80 x 4 AP = 320 AP
1 artangels = 1400 mana
+ 3% of your mana in AP, and 45 (1400 mana + 2900 + 600 from runes + 1100 mana as a minimum for ryze? = 6000 mana)

so you get 6000 mana, and the AP:
6000 x 0,03 = 180 + 320 (artangels and rod of ages) + 155 (rabandons as last item) = 655 + 30% = 851

so with 1 artangels, 4 rod of ages, and 1 rabanens, you get MORE AP then this build, you get 2000 mana more

but a tips, if you get the mana buf, you can cast your spels almoust al the time (overload - runerison - spellflux - overload - desperate power - overload - spell flux - overload - runeprison - overload, this como have around 3.4 secound cooldown, becouse of the cooldown, deeling 60% of your total mana (60& of 6000 is 3600) and around 3x your AP (851 x 2 = 2553)
so 3600 + 2553 + 130 x 5 (overload) + 660 (runeprison + spell flux, if you only hit 1 on spell flux) = 7463 !!!!!!

7463 damage - 27% (the normal magic resist) = 5448, normal magic resist on a tank are around 50% = 3700, so short seyd, you K.O ANYONE in less then 4 secounds with 1 artangels, 1 rabandons, 4 rod of ages, and the mana buf!!!!!

also, if spell flux bounse, you can get 10.000 damage, if you have a fidel (10 less magic resist) and somone with Abyssal Scepter ner the enemi you are attacing!!!!!!