Character Card Deck effects

i dislike the hero set, it's utterly useless in my opinion 5% cooldown reduction is what? a second off from a skill with a 50 second CD?
and the drain only activates one per minute, and randomly.

edit: half a second, GG.

It's nice for Demon Slayers, granted I'm using the Merc's 4% CDR

4% CDR on lvl 15 Endless is 12 seconds (Lvl 16 is 11 seconds)
4% CDR on lvl 20 Binding is 5 seconds

It doesn't seem much, but being able to bind 5 seconds sooner and Endless 11/12 seconds sooner is a plus in my book.