consider shrike's role in a battle,
He would spend days, or weeks moving into the best position so when the battle began, he had the best spot (so lots of mud).
I would also expect him being a commander, and being fast (gogo jump pack) to see LOTS of action on the battle field. (so lots of chips)
But I am very biased towards that stuff, so get more opinions. Seeing all the picture perfect eldar china dolls is not how war is fought, it's dirty, it's in the mud, it's using everything you got to kill the other guy, and maybe survive.
~dan