Rogue/psion build per un personaggio.

Hello everyone, soon I will start playing a campaign (latest edition) set in the Skyrim universe. I will probably play a Dark Elf, and I’d like to build a psion with the Psi-Warp subclass combined with rogue.

The backstory would be that of a Dunmer (Dark Elf), daughter of a wealthy patrician, trained to enter the Morag Tong (an assassins’ guild) to gain political advantage.
My character, unsurprisingly, decides to run away, with all the consequences that follow.

Now, I’d like to create a build that is coherent with the background, functional (I’m not looking for something broken), and fun to play.
The idea is to use psi-warper powers to teleport around the battlefield while making use of Sneak Attack.

I’m unsure about the rogue subclass: Soulknife comes to mind, but I’m afraid it might feel redundant. However, I don’t know what other alternatives might fit well with both the build and the main class.
I also have no idea how to balance the progression between the two classes.

Can someone help me?