Just need to figure out how much we need to bribe Bostria to get an infiltrating TO Camo Shaasvastii seed-biker. :)
Troops with Stealth and Impetuous or Extremely Impetuous (or frenzy) orders still have stealth, yeah. Look at good ol' Eudoros in the ASS (pun not really intended, but too funny since Spector tried to this weekend in a tournament... spoiler: Spector died, but accomplished his mission). You need a bike without Frenzy or Impetuous, since *all* marker state gets thrown out of the window if the troop gains a Fury-related order, I think.