M8, full chan on every arcane except for psychic is a must if you wanna be relevant in mass PK/1v1.
However you may want to have 2 sets for mystic/veno as they may have to go support, thus requiring more survivability. For this purpose, roll for triple -% phy dmg taken and physical defense on top/legs/boots, switching wrists is not necessary and you need the channeling from them. But get the channeling set first, I barely switch to the defense one unless full tryhard mode with 2 3.33 sins on me, but even with the set, I doubt you can survive that sht.
for psychic just aim for crit and mag as mentioned above. easiest class to gear so i'd start off by it.