I ask, because traveling through Mirkwood in general could easily get overwhelming. For instance. The shortest route through the Narrows is an 80 mile trek through daunting terrain in a Shadow land. This would require 12 days and 12 corruption tests from each player. Not only would just performing all the rolls bog the game down, but also could very quickly raise a characters shadow score to an unmanageable amount. Considering the existence of Sunstead in DoM, this is a route that the players might make fairly often.
Traveling the length of the Old Forrest Road would be much worse, requiring something like 44 corruption tests.
(70 miles through Western Mirkwood:9 days, 2 corruption tests + 140 miles through the Mountains of Mirkwood: 21 days, 42 corruption tests)
I know the rules state:
So how are other loremasters handling this?It is left to the discretion of the Loremaster to determine
whether a place is considered blighted or not. It is
possible for an area found within a region classified as
Wild, Shadow or even Dark not to require any Corruption
tests to traverse.
Also, how do you set the TN for corruptions tests due to traveling through blighted places?
Most of the time, the Target Number for the roll is 14, but it
can be raised or lowered by the Loremaster depending on
the severity of the source of corruption.