Yeah like me these days.
I played mostly MP but now am playing SP mostly.

I am now in a VERY interesting campaign as Al-Muhads, civil wars etc etc. Just built the infrastructure necessary to train Hashishin. The Hashis are absolute killers. In MP given the opportunity, I have used them to devastating success. They gain valor like it's nothing. Of course because of their fragile dopey state they have to be handled very carefully.

They are too expensive, and taking two years to train when Janissaries take 1 year is very strange math to me.

I think the Beserkers will function in a similar manner except they may have the Hashis weaknesses ironed out.