Sura and Kunoichi should have skills that cancel other skills like Blademaster's "Evasive Strike". Sura and Kunoichi are the only assassins that does not have movement skills with invincibility.

I suggest that maybe you could add a "Ghost Step" for both Kunoichi and Sura just like from PC.

A skill just like Berserker's "Off-Kilter" but no damage, no cc, 2 seconds cooldown, short movement, have invincibility, and can cancel skills.

Add it as a flow for Kunoichi's "Viper Strike" and Sura's "Blinding Slash" where the skill changes into "Ghost Step" with lower cooldown when flow: "Ghost Step" is on. 

Also, please increase the cooldown of "Smokescreen" and "Shadow Cloak" upto 24 seconds, but also increase stealth duration for 10 seconds. This will totally stop adventurers from abusing stealth skills.

Lastly, Kunoichi's damage is quite low, in her passive "Seal: PvP Damage Recieve -15% for 10 sec" change it into "Seal: PvP Damage Dealt +15% for 10 sec" she's an assassin not a tank.