From Wikipedia:
The
Sha' ir is a character class originally introduced in the
Al-Qadim campaign setting for
Dungeons and Dragons 2nd Edition. Based on Arabian folklore, the sha' ir is a mysterious and powerful wizard
that gains their power from genies, and often acts as an ambassador on behalf of mortals to geniekind. Sha' irs are both feared and respected for this role.
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Sha' irs cast spells by
requesting that their gen go find them.
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Sha' irs possess the training and tact to deal with these powerful creatures, either through diplomacy, flattery (of which genies of all types can't get enough of), or coercion.
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Often, a sha' ir will seek to enter into a pact with a genie. Common lengths include 1001 days of servitude, or a dozen and one months. The finer details are worked out between the sha' ir and genie in question, but often include a laundry list of conditions.
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In an Arabian-flavored setting, a sha' ir will often take the place of a wizard or sorcerer,
and act as a party's "faceman." Sha' irs are skilled in diplomacy and
require a high charisma score, making them ideal for the job.
I'm not seeing a Wizard there. I'm seeing a charisma-based genie pact Warlock - preferably providing an alternative to the Binder as a warlock controller; things like the ability to go diving for spells replacing the near-useless pact boon. Why do you think Warlocks wouldn't fit?