Did you see the rogues skills?
http://www.silkroadforums.com/viewtopic.php?t=21424
R2C2: Stealth
Skill form : Active
Skill attribute : Buff
Use Weapon : Dagger, Cross Bow
Effect:
Make you invisible, but speed of travel diminish.
L1- Continuous hour 60 second, stealth 3 grade
L4- Continuous hour 60 second, stealth 6 grade
"R2C3: De-stealth
Skill form : Active
Skill attribute : Buff
Use Weapon : Dagger, Cross Bow
Effect:
L1- Continuous hour 60 second, circumference scope radius 10.0m, stealth discovery 3 grade
L4- Continuous hour 60 second, circumference scope radius 10.0m, stealth discovery 6 grade
Note: This skill can be used to detect stealth character and also invisible fire trap. "
They have a skill that let them see cahr at their and same level, but they need to use the skill ^^