I'll edit my post later with the info on the items, but currently, Centurion power hasn't been found. And its a 12 star rare. You're looking at SJS type rare. At least with God/Ability, it was a more reasonable method of stat maxing.
Heavenly are pretty rare too, but not bad.
Heavenly battle only seems to be about a 40% increase in speed from what I've heard. However, I haven't gotten one to be able to test it properly. Centurion/battle currently hasn't been found either. But I'm betting its only 50%.
The only Centurion slot item is Centurion/Ability. Which adds 30 to each stat except ATA, which it only adds 2. This is only 5 more than Heavenly/ability, which is only 5 more than God/Ability.
So if the pattern continues:
Centurion/power: 60 ATP
Centiruion/Battle: 50% increase
Anyone know any good guides to cap out RAcast assuming material usage is 150 max? This is gonna be my first class to 200. Also, assume that the user has no better than god... but if its impossible with god units, try with heavenly units, but not centurion as I'll likely never see a centurion unit lol.