Might just be jumping to conclusions, but Mantra W seems very lackluster compared to Q and E. Can only see it being used in 1v1 duels...but then again Mantra Q + W's root might be even more effective for that purpose.
Blah blah PBE subject to change etc. will wait and see.
Path of Exile Ambush League - Lvl 89 Glacial Cascade Witch - _Kenzorz_
League of Legends (EU WEST)[Active] - Kenzorz
NA GrandChase - Kenzor