yeah it has been asked a lot , and i have searched , but since R9 there has been ton of changes plus new builds 
im wondering about Cleric , since it looks like the most durable and being able to put good numbers , zealot mostly , but looks like inquis is king on solo challenge mode.
i dont mind taking a bit to kill stuff if in the end it just dies , but no take 30 min while other build takes 5…so my question is about solo the hardest content ? w/o OP gear. and with good gear?