If you had a +2 Staff of fire greater do you and +2 to attack rolls with spell?
If you had a +2 Staff of fire greater do you and +2 to attack rolls with spell?
No, you do not. The item "Spell Duelist's Wand" is the item you need to get a bonus to spell attack rolls. You might persuade your GM to let you combine the two items into one, or house rule it. But RAW, no, the +2 is only to attacks made with the staff as a melee weapon