The Warlocks Den - WoW Warlock Discussions

This question has been asked in the Warlock's Den forums over and over, and the answer is generally:

But why? Is there anything special about 25%?

I used a spreadhseet model to have a look at the damage contribution of two key Shadow Bolt (SB) talents, Improved Shadow...

A while back, I switched from a classic affliction build (raiding 42/0/19) to DS/destro (0/21/40). I had 202 spell hit, over 1100 shadow damage, and 21% chance to crit with Shadow Bolt. My DPS dropped like a stone against multiple T5 bosses.

Warlock's Den posters sternly advised at least 25% spell crit for Shadow Bolts after talents (see Crit needed for Destro build?, for example). I collected some side-grades, traded shadow damage for spell crit, and respecced again after I was...