AP item buff idea - Rod of Ages

Before the changes to mage items in the S6 mid season, Catalyst of the Protector (and Rod of Ages as its upgrade) used to have a passive that gave mana (and HP) back on leveling up. This passive made Catalyst a valuable buy for mages in lane, on their way to the full Rod of Ages.

After the changes, Catalyst gives HP on mana expenditure (good for mages, as a form of sustain) and mana on damage taken (less good for mages).

So, seeing as the mana return on leveling passive was an important part of Rod of Ages, why not return it?

Version 1:

Rod of Ages

Builds from and and - total cost 2800 - 3000 gold

300 HP (500 after stacking) 600 Mana (700 after stacking) 60 AP (100 after stacking)

Passives as currently (Eternity, stacking)

Version 2:

Rod of Ages

Builds from and and - total cost 3100 - 3200 gold

300 HP (500 after stacking) 600 Mana (700 after stacking) 60 AP (100 after stacking) 10% CdR

Passives as currently (Eternity, stacking)

Version 2 is more powerful with the CdR, but also more expensive. It is supposed to serve as an alternative to - less CdR, no Grievous Wounds and more expensive, but also a good chunk of HP, more mana and the sustain passive.