General

Which Sylph ring to choose

I figured I wouldn't have time or luck to make an SS ring, so I just bought a Slyph ring. But which one would be best if I only have 50% crit rate and 9% crit damage?

In case you aren't aware, you can choose between 6 rings, but the ones I'm mainly considering are one of the ones that give +5% crit damage, or the one that gives +10% crit rate.

Oh and I'm a Hero.

thanks...