All you need to make a stealth check is cover or concealment. So can you make a stealth check from the 50% concealment granted by Lightning Stance?
If yes, what about the 20% concealment vs ranged attacks from Wind Stance.
It came up as I was looking for a mundane way to make a Pathfinder version of Flash Step.
The 50% concealment has no conditions once you meet the activation criteria, so I don't see why it wouldn't work.
That 20% concealment from wind stance only works against ranged attacks, so it's not really 20% concealment, only CONDITIONAL 20% concealment. So you'd only be stealthing vs ranged attackers, I guess ?