This is a horrible item no matter who is building it. There isn't a single item in this game that grants 15% (or 5%) cdr. Since the cap is 40%, you'll always have more than what you need or you won't be able to reach 40% at full build. So why don't we adjust the numbers on this item so people are able to reach the cap? I suggest making it 10% instead of 15% and reducing the cost slightly.
Durzaka4 votesThis just in
A core mastery a large amount of people take give 5% CDR.
Vistha Kai3 votesDo you even http://img2.wikia.nocookie.net/__cb20131121235650/leagueoflegends/images/f/f5/Sorcery_mastery_s4.png Sorcery bro?
The Bearded Bard2 votesMy cdr runes get me 15% at lvl 18, there are two masteries that get you 5%.
D1rtFarmer2 votesRiven buys this.. as a display of her certain disregard to needing armor... or any defense what so ever.
Deep Terror Nami1 votesCDR Runes and Masteries, or simply not placing the arbitrary rule on yourself to get exactly 40%.
Strawberrycocoa1 votesWell, excess CDR is gold that could have gone to other stats. Just saying.
Deep Terror Nami1 votesI mean 35% not 45%
Strawberrycocoa1 votesOh, my bad sorry
OhOkYeah1 votesSome people grab the 5% cdr from masteries and finish it with the boots.
Abyssphere1 votesCDR masteries, Lucidity + Grail/Morello is the easiest 40% CDR you'll ever get. It's standard for me on mages.
Wickedfates1 votes5% cdr on mastery for a utility AP poke support champ (maybe sona <3 u 
)
This is a horrible item no matter who is building it. There isn't a single item in this game that grants 15% (or 5%) cdr
Dreadlocks1 votesuse runes and masteries bruh.. they can fill that 5% so easily
Cloud2731 votesI didn't think that cdr from masteries or runes counted towards the cap.
WarlockLaw1 votesWhy wouldn't they? If they didn't count towards the cap you could get something like 60% cdr easily which on a number of champions would be extremely problematic. It's a hard cap nothing over that can exist outside urf
