
My Self |
Ranged Spellstrike (Su)
At 2nd level, whenever an eldritch archer casts a spell that calls for a ranged attack, she can deliver the spell through a ranged weapon she wields as part of a ranged attack. Instead of the free ranged attack normally allowed to deliver the spell, an eldritch archer can make one free ranged attack with a ranged weapon (at her highest base attack bonus) as part of casting this spell. The attack does not increase the spell's range.
If the spell can normally affect multiple targets, only a single missile, ray, or effect accompanies each attack; if the spell allows multiple attacks and the eldritch archer can make additional ranged attacks as part of a full-round action with spell combat, one additional ray, missile, or effect from the spell accompanies each subsequent ranged attack the eldritch archer makes in the same round until all attacks allowed by the spell are made. Unused missiles, rays, or effects remaining at the end of the eldritch archer's turn are wasted.
This ability alters spell strike.
DESCRIPTION
A fireball spell generates a searing explosion of flame that detonates with a low roar and deals 1d6 points of fire damage per caster level (maximum 10d6) to every creature within the area. Unattended objects also take this damage. The explosion creates almost no pressure.You point your finger and determine the range (distance and height) at which the fireball is to burst. A glowing, pea-sized bead streaks from the pointing digit and, unless it impacts upon a material body or solid barrier prior to attaining the prescribed range, blossoms into the fireball at that point. An early impact results in an early detonation. If you attempt to send the bead through a narrow passage, such as through an arrow slit, you must "hit" the opening with a ranged touch attack, or else the bead strikes the barrier and detonates prematurely.
The fireball sets fire to combustibles and damages objects in the area. It can melt metals with low melting points, such as lead, gold, copper, silver, and bronze. If the damage caused to an interposing barrier shatters or breaks through it, the fireball may continue beyond the barrier if the area permits; otherwise it stops at the barrier just as any other spell effect does.
Can Eldritch Archers shoot fireball arrows?

Blakmane |

The spell does not allow you to target creatures (only a grid intersection), so even if you could use it with ranged spellstrike, would there be any advantage? The arrow would not do any extra damage because it isn't actually striking a target (only passing, or failing to pass through, a narrow gap).
At most you could use this to add your bow's enhancement bonus to send the fireball through a narrow passage.
I think you'd find the common-sense answer is 'no' though.

My Self |
The spell does not allow you to target creatures (only a narrow passage), so even if you could use it with ranged spellstrike, would there be any advantage? The arrow would not do any extra damage because it isn't actually striking a target (only passing, or failing to pass through, a narrow gap).
At most you could use this to add your bow's enhancement bonus to send the fireball through the passage.
I think you'd find the common-sense answer is 'no' though.
That sounds reasonable. That saves me from asking if it would affect an area or just a single target.