Campaign farming

is there a campaign level thats best to farm equipment on?
also if i have orbs is there a best campaign level to use them on???

The easiest way to farm is level 205. The fastest time I farm it is 18 seconds.
The sphere is best used at the last levels of books (for taking artifacts). In general, there is no difference.

my guild finally woke up told me same thing but i love how short an sweet your explantion is