Besides the big six you mean?
If you're planning to be a sneak/scout then you want darkvision one way or another. Nothing gives you away as well as a light underground.
If you don't have extended range then you'll probably want a ranged weapon. Maybe a crossbow and a handful of magic bolts.
Telekinetic haul can be used to 'fly' by picking something up and standing on it. Boots of the cat may be useful if you're planning to do that.
Arrowmaster's bracers might be useful when you've got a lot of money to splash around.
It depends what you're going for. When I stepped into a friends campaign for a single session to replace the rogue no-show I played a thieving burglar type character who had no levels in rogue; he was a Teleinteticist who used abilities like Kintetic Leap and Telekinetic Finesse to get to things normies could not. As such I chose items that enhanced his roguish abilities such as Goggles of Minute Seeing and Gloves of Larceny.
You can't use a Ring of Sustenance to nova every couple hours just like you can't do it with a caster or any other class that spends resources.
If you're trying to build a Kineticist for a 15 Minute Adventuring Day style, why aren't you just playing a Wizard?
If you want damage, why Telekineticist instead of Pyrokineticist or Geokineticist?