User blog comment:Degritone/Wdrei, the Jumbler/@comment-27859592-20160709135520/@comment-25364408-20160709170047

Yes, because with CDR > AP, it's harder to get AP that was, as you can only get 120 CDR from items. If it were gold equal, it would be a lot less. And as for AD > Mana, I tried putting it at equal value, but you got thousands of mana just from one AD item. Even now, you can still get 700 from one item. Heck, if you get Muramana, it gives mana based on mana and up 10-40% spellvamp. With 1-1 on AD > mana, you get 625 mana from Muramana's AD alone, let alone the mana it gives which scales with itself.

I randomized which stats go with which, but I tried to make them make sense in how much they transfer, rather than making things go 1-1 on gold. If we made HP5 > health 1-1, you'd be getting 13.5 health per HP5, making things with 200% HP5 give 2650 HP. On their own. In a single item. And that doesn't make sense.