Just bought the whole Wh40k package and about to start from the IG campaign.
What difficulty level should I chose? My initial pick would be "challenging" as I dont really like the idea of the "inflated" enemy units on higher settings.
On the other hand I would also want to avoid the "blasting through everything with 15 titans" as some people here complained is possible when you have too much prestige.
I'am a PZC veteran and would like a worthy challange but without the "you did a single wrong step/lost a unit thus you are screwed, game over" phaenomena. So probably the highest difficulty level is out of the question then.

Which one should i pick? Challenging or hard?
thanks in advance for the input,
Sch