Many guilds and pugs that have moonkin have mage/warlock prio on items like ToEP etc powerful items. I always ask why and they say "they do more dps, more benefit for raids."
But it contradicts with the fact that Frostbolt has coefficient of 3/3.5*0.95 = 81.4% per spellpower and Starfire has 3.5/3.5 = 100%.
So in other words Frost mage gets (1*0.814)/2.5 = 0.326 dps per spellpower before any talent modifiers while Moonkin gets (1*1)/3 = 0.333 dps per spell power before talent modifiers.
Fireball also has same coefficient than Starfire.
So in theory shouldn't 100 spell power item benefit raid more if given to moonkin instead of frostmage? 100 spellpower increases raid dps by 33.333 if given to druid and 33.326 if given to frost mage.
Of course without simulation tools it's impossible to say the actual dps ups because it varies with gear etc. (moonkins get faster casts after crit etc.) but shouldn't all casters be treated equal?
Am I missing something or don't guilds/pugs understand that every caster basically benefits from spell damage equally?