I think only the NA server experiences the ban wave. Here in INT server, we can henir normal 3x a day without even disconnecting from the server (poor internet tho). But I am keeping my profile low through cheats like 2/5 crit damage, 5/5 crit chance and 2/5 atk spd. that composition will not make a huge significant damage to notice, but it can finish the henir normal in a favourable time. But still, Henir challenge is not recommended because of the keen eyes of the GM's