For those of you who put your companions in PA, what mods do you give them?

I tried modding my companion with Stealthboy, but:

1) It doesn't consistently activate on crouch, even when she's ordered to stay put

2) Enemies STILL spot her 100 feet away, in pitch blackness, WITH the stealth field active. Which leads me to believe the stealth field is bugged for companions.

Anyone know for certain which mods *do* work for companions?