Is choosing to cast Haunt when the whole duration be reserved purely for Malefic Grasp spam better than refreshing DoTs part way through? Always stacking both debuffs at once for the maximum duration after making sure no DoTs will end within the 8 seconds of Haunt should be optimal assuming you don't let Soul Shards stack to 4?
When using the Glyph of Demon Training is the Felhunter/Observer still the best pet for Destruction? Only been doing some dummy testing, but it seems that the Imp is slightly ahead so far.
Glyph of Demon Training should give you no dps gain at all.
It causes the Imp to cast faster but as the Imp is now limited by energy and not by cast time, this makes no difference in sustained dps.
The best pet choice for all three specs is in the SimC thread. The Destruction one is in this image.
Do the three hits actually increase proc rates, as I tend to think they wouldn't since I read on these forums that only the second bolt actually gives demonic fury; but I have no way of being sure as I don't currently had any trinkets with stacking affects to test it.
Since it's a minor glyph I assume it's just a graphical change and doesn't actually increase anything, but I don't mind being wrong.
It does not increase proc rates. In fact, there appears to be a bug causing the glyphed shadow bolt not to cause any "on spell cast" procs at all. This is easy to test if you have something like the [Illustration of the Dragon Soul] - glyphed shadow bolt will cause zero stacks, non-glyphed shadow bolt will cause one. For "on spell hit" procs, such as [Darkmoon Card: Crusade], they both cause one stack, you don't get three from the glyphed version like you might expect.