| jonjonhholt |
Well, if you break down the components of the ability, you gain a +4 bonus from covering fire or harrying fire if it is provided by your bonded ally. Your ally likewise gains a +4 bonus from covering or harrying fire if it is provided by you. Your ally has two means of providing covering/harrying fire, the first being with a ranged weapon (requiring the usual rolls to succeed), or with a spell (that automatically succeeds).
As for the conjuration aspect, it doesn't specify that it is an entity (as in a living entity), just that it is a small, spherical, floating wisp, which later in the spell states it is "made of pure light and energy." Since it is not an entity in its own right, I go back to my original statement of this spell simply being a different path to providing the covering or harrying fire.
Does that help?
Yes! Thank you for the clarification!