I've noticed in LMS, WOE and KOE, shadow chasers are allowed to use feint bomb while GX can't backslide or at least has delay.
Feint bomb is exactly like back slide of GX, but better. Why? Aside from spammable skill to retreat and that it has AOE damage, it gives 1-2sec of invulnerability after it is last casted. That woud be fine if the SC couldn't attack or if he can still be hit by an AOE skill - but no.
Once cast, SC back slides, then becomes invulnerable for a second or two. In that brief period, he isn't detectable (yes, there's no black silhouette even when u wear an Akatsuki Charm or Maya Purple Card), and he can attack and cast skills too. He can even walk around while being invulnerable and undetectable.
I tried to backslide at LMS, there's a delay. I tried switching to GX to see maybe it were just my Sura or WL, considering Sleipnir Ulti allows you to backslide, but no - still delay.
I tried to backslide at WOE, it's banned inside the castle. KOE too.
But feint bomb enjoys these nerfs.
Hope you can do something to balance this out because as it is, I'd recommend everyone to just switch to SC and just exploit this imbalance. It'd make breaking emp at WOE/KOE, and winning LMS easier anyway.