As far as i am aware - there are no soft caps nowadays, the diminishing returns are history.
Elijah_Crow wrote: »Agreed. You should aim for 50% crit and then focus in increasing crit damage, weapon damage, and armor penetration. I've tested extensively and sacrificing any of the others for more crit results in lower sustained damage over time.
Just a matter of maths.
70% crit chance with +30% crit damage means a 21% DPS increase.
60% crit chance with +40% crit damage means a 24% DPS increase.
50% crit chance with +50% crit damage means a 25% DPS increase.
40% crit chance with +60% crit damage means a 24% DPS increase.
30% crit chance with +70% crit damage means a 21% DPS increase.
For every %crit chance you got, make you sure you got about 1% crit damage. If you're on PC, make sure you get an addon to also know what you +%crit damage is.
But knowing when it's better to go for spell power/weapon damage is another thing entirely...