spellfire set, as mediocre as it is, is not worth the time spent getting the mats unless you happen to have everyone on hand (you bought all your gold illegally).
aside from pure +dmg, it has atrocious stats and is outrageously expensive as well -- requiring you to specialize in high end tailoring when there are so much more beneficial tradeskills to have...
use that money for enchants on the actually good gear (pvp sets, for instance). kara is not hard to get into and everything in there is better than spellfire any day. and much more entertaining to obtain...