Flanking rogues (ie.. in melee and 'across' from another ally with a foe in between) always get to apply sneak attacks (assuming their foe is vulnerable and doesn't have defenses against it) as does a rogue who feints. Your typical sniper (like Elise) has to do a bit more to get the 'sneak attack' again.<br/><br/>Fantasy and I are arguing over how. The way I've seen it played in Pathfinder is you have to 'lose' the foes attention. (IE.. duck back down an alley and reposition, or a spell like vanish/Invis) and reposition. Or hide behind a wall. Or like Wintercat said.. have the foe make a Perception vs the Stealth Check (-20) and remain unspotted.