I very much recommend using high Thought Control, as you can essentially use Fear and Enrage to make your life so much easier and drop in and out of stealth.
Tabi Boots would be very good.
I don't actually recommend using any PSI carapace armor (PSI beetle or PSI crab, etc.) as the armor penalty simply isn't worth it. Most good stealth armors also won't be giving much Armor Penalty regardless (like Phantom Dancer). Armor Penalty will only make your stealth stats lower, as well as Evasion & Dodge. PSI-Stealth build is very optimal, and at a high enough level, you probably won't be taking much damage.
I recommend a psychosis build instead of tranquility, and making a high psi crit and stealth build. I recommend PoopiemcButtface's "A Detailed Psi Guide" and going off his psychosis-build stuff.