My set (Obran), need advice about active

[Obran]

I have 20% CD active, but I noticed that there is a period when I play without its activation and my cd then is 35%~.
Not sure shall I go for more cooldown reduction.

[Rumbaar]

I feel that CD is the one of the best skills to focus on in cards, as it's effects impact more on combat than most others.   Other than dodge.

So you can get that 30% without loss of other key stats, with some good card combo's.  Though some of those are rare cards, with great primary stats.