Necropolis – “Forward and Inward” [Campaign 2, Mission 2]

I completed the entire campaign on "hard" difficulty. I enjoyed it! A well-planned battle is truly the key to victory. All battles, except for the final ones, were won without any losses. I always played using the path of blood. The second level of "blood" is very helpful as an offensive weapon.
By the way, for some reason, after reaching level 2 in "blood," the path of tears didn't activate... even though I reached level 1 in tears... but it didn't become available. Why is that? Does anyone know?
Also, the game sometimes crashes... or rather, it freezes before a battle... Not often, but it's getting annoying.