User blog comment:Lukeatlook/Pyro's Item Overhaul 5 - Supports and the CDR Overload/@comment-12443575-20140719102841/@comment-4813965-20140720125747

Not really. Those items have big CDR so that the moment you buy the first one of them, you can get significant CDR boost. Keep in mind that first 20% CDR is less powerful than second 20%, since the latter is relatively 25% (20 out of the remaining 80).

So Talisman should definitely stay at 20% - but I think nerfing FH and Athenes to 15% (and lowering their price) is one of the possible ways to do it.