Sorcerous Shadowruby testing (Jewelcrafting Damage Neck)

[Searix]

http://www.wowhead.com/item=130233/sorc ... by-pendant" target="_blank

At 7/7 upgrades it's
+1094 Stamina
+1311 Secondary stat (Crit for me)
+525 Secondary stat (Mastery for me)
+Prismatic Socket

On use: Cast a random damaging spell at your target (5 min cooldown)

For mages this means it casts:
http://www.wowhead.com/spell=222305/fireball" target="_blank
http://www.wowhead.com/spell=222320/frostbolt" target="_blank
http://www.wowhead.com/spell=222321/arcane-blast" target="_blank

On a 5 minute cooldown.

The purpose of this thread is to test what affects it and what doesn't.

What I've learned:
-Not on GCD
-Cannot be casted while casting other spells (best macroed to another damage spell, e.g. /use 2 /cast Scorch or in a bigger macro)
-30 yard range
-IS affected by rune of power
-Does not seem to be affected by Combustion
-Skada very buggy with it. Does not sometimes pick up the damage. Will roll fireball into your general fireball damage
-Slight less damage than what the tooltips say, around 5% less damage

Biggest question so far is why it's doing 5% less damage

[Searix]

Testing and found out a few more things:
-Not on GCD
-Cannot be casted while casting other spells
-Skada does not sometimes pick up the damage.
-Best macroed to another damage spell, e.g. /use 2 /cast Scorch or in a bigger macro

Added to OP

[Kver]

Quick guess would be that it's just spellpower scaling and has a different spell ID than your fireball, so it's not affected by artifact. What level is your great balls of fire?

[Searix]

3/3 but my main concern was why frostbolt and arcane blast as fire spec still do ~5% less damage than their tooltip says

[Manaburnz]

This 1 shots timewalking bosses. Did 1.28 mil with just RoP on use

[TinaMcNasty]

Curious how strong the on use of this neck is. If I already have a neck with good stats and socket, is this neck worth buying and upgrading for the on use?