Just a quick build I'm posting to show that even though clerics got turbo-buffed in Pathfinder and arcanists and shamans are a thing now, wizards still got an ace or two up their sleeve.
Gregor Korath, the Magical Mastermind
Human Exploiter Wizard 9, Abjuration and Divination Banned
Exploits/Feats:
L1: Acadame Graduate, Spell Focus: Conjuration, School Understanding" Necromancy {Exploit}, Command Undead {Exploit -> School Bonus Feat}, Scribe Scroll {Wizard Bonus Feat}
L3: Augment Summoning
L5: Evolved Summon Monster, Craft Wondrous Item {Wizard Bonus Feat}, Potent Magic {Exploit}
L7: Superior Summoning
L9:
Resilient Illusions (Feat -> Wizard Discovery), Familiar {Exploit}
Notable Equipment: Cord of Stubborn Resolve; Prayer Bead of Karma;
Cracked Vibrant Purple Prism Ioun Stone to activate the Prayer Bead of Karma; Headband of Intellect; Cloak of Resistance; various stupid +1 AC and save boosters; various stupid Spellcraft, Concentration, Knowledge: Arcana, and UMD boosters. Has money saved up for undead creation. Few scrolls.
Tactics: Gregor plays like any other mid-level wizard, just turbo-charged. He loves the hell out of the animate dead spell and put most of his resources towards making bloody skeletons in order to cut costs. I've personally played as a necromancer in a few 3E D&D/Pathfinder games and your undead minions can eat through your money like candy if you prefer to have many marginal minions (like I do) instead of one or two badasses. The necromancer school ability gives Gregor Command Undead for even more minions -- however, a strict reading makes the Command Undead feat work off of the cleric level, not the wizard/arcanist level. If your DM decides that RAW trumps RAI, go with Divination or Void instead. Both are just as good or arguably even better, we're just sticking to a theme here.
In combat, he uses one of two tricks to cement his status as minion master: the first one involves illusions, the second one summons. Of course, since Gregor will get access to the advanced shadow conjuration line these tricks sort of blend together at that time and even become redundant. But right now, he's like level 9 people. In any case he opens combat by dropping an illusion on the people he hates (and with Potent Magic, Prayer Beads of Karma, and Resilient Illusions his illusion spells are devillishly hard to resist; they'll only become moreso when he can afford orange prism ioun stones for the
resonant wayfinder power and an
ebon wayfinder).
Finally, Gregor also has the option of using conjuration magic. Since he can get a +3 to the save DCs of his conjuration spells, this works out very well for him. But don't count out his summons. Since he can cast conjuration spells at -1 round (min. standard action), he summons just as quickly as the occultist arcanist or the summoner-class. Evolved Summon Monster allows him to really beef up monsters that are balanced around one badass attack by giving them two extra claw attacks. Superior Summons allows Gregor to do silliness like drop up to four celestial tigers with Summon Monster V the middle of the enemy line, completely ripping fools to shreds. True Seeing is less of a hassle than you think it would be for an illusionist because it starts only getting common when the shadow spells come online and Gregor can still default to his 'normal' spells, undead minions, and of course summons.
Alternate Builds: There's no reason why Gregor has to be an Exploiter Wizard if you don't want him to be. And honestly it's kind of a suboptimal way to build the character, especially if your DM is big on RAW-nerfs. +2 to the caster level and DC of your spells is boss as fuck, though you could make a strong argument that you'd rather have an Item Arcane Bond and be a Thalossinian Necromancer or a Conjuration (Teleportation) wizard. Especially if your DM holds you to a strict reading of Command Undead.
If you have a feat to spare (Evolved Summon Monster or Craft Wondrous Item is probably the most expendable feats) going half-elf isn't a bad deal. Paragon Surge fucking rules, especially at level 15 and you can use it to snag your ass some Spell Perfection if you keep up with metamagic.
