A couple of questions about Pathfinder (mostly gear, some min/max)

[Aidjn]

My DM has finally given us a nontrivial amount of gold and I'm interested in buying some magical items. I am a level 4 witch, pretty bog standard. I have 7k~ to spend; what do I do here? It's my first time playing tabletop, so what books should I be looking at for researching magical items? DM is allowing any core stuff. My equipment is currently a Ring of Wizardry I, a ring that gives me one additional spell slot of any slot I possess, and an amulet that gives a +1 deflection bonus to ac.

Also, I have a DM-given homebrewed ability to transform myself, in which my spells act as my int modifier is really my int, cha, and wis modifiers summed. So if I have a +5 int mod, a +1 wis mod, and a +0 cha mod, my total modifier is +6. Is there any way to abuse this aside from enhancement bonus buff spells?

[The Random NPC]

Depends on what you mean by "... my spells act as my int modifier is really my int, cha, and wis modifiers summed." Otherwise I would look in Ultimate Equipment or d20pfsrd.com (http://www.d20pfsrd.com) for your equipment needs.

[Aidjn]

Depends on what you mean by "... my spells act as my int modifier is really my int, cha, and wis modifiers summed." Otherwise I would look in Ultimate Equipment or d20pfsrd.com (http://www.d20pfsrd.com) for your equipment needs.

Thanks for the link.

Add the modifiers for Int, Cha, and Wis together. All spells/hexes use this combined number as the modifier for the purposes of DCs, damage, etc.

[Keneth]

Well if you can combine all mental stats, then what you'll be going for is a headband of mental superiority (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/h-l/headband-of-mental-superiority). But for starters, just get a headband of vast intelligence (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/h-l/headband-of-vast-intelligence) +2. Unless, of course, you have the option of crafting magic items, in which case a headband of mental prowess (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/h-l/headband-of-mental-prowess) +2 is better and affordable (at 5,000 gp).

[Spore]

Rods and Scrolls for Use Magic Device.

Other than that, just a headband of vast intelligence +2 or a belt of mighty constitution would be most useful to you.

[Arbane]

Spell scrolls to feed your familiar. MORE SPELLS! (I may be biased.)

You might not need it yet, but a Stone Familiar (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/r-z/stone-familiar) would be a good investment later.

A Rod of Extend Spell or Reach Spell might be useful, depending on what spells you use.

If you're doing the Misfortune/Cackle combo (and YOU SHOULD BE), a Quick Runner's Shirt (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/r-z/shirt-quick-runners) might be useful for those times you REALLY need to cackle, hex, AND avoid getting stabbed all in one turn.