User blog comment:JmLyan/Roon, the Wielder of Relics/@comment-32109419-20151217153212/@comment-7481207-20151217174404

Q's passive doesn't have a limit other than the natural CDR cap. R's passive is one extra sigil per rank, as stated in the innate passive's description.

E's range is based on Yasuo's Q in E range, also stated as 375. The wiki has a serious radius inconsistency issue, so take those with a grain of salt. I'll halve it's cd refund though, in favor of the critical hit strike applying it a second time. He has no defensive abilities (other than lifestealing from E), so being in the middle of a fight is dangerous enough to make abusing the refund difficult.

R is fairly risky as it is, seeing as failing to get a stack means you basically used a fifth of a TF ult sans the near global teleport.

E's interaction with rageblade (and the Tiamat item line for that matter) work the same as Dragon Shyvana's Q (only one splash per attack). I meant to mention this and a few other things in the ability details, but somehow forgot.