So for more details, this war have 4 days played and i got really lucky with essential items i need to play Arm.
I managed to get the 2 BiS legendaries for T21 in 2 days.
And also an arcano crystal.
I still think i " deserve " some of this luck because i played a Demon hunter before this War and i got my 2 BiS legendaries in last. And i never got an Arcano on the character after 2098 hours played.