I still think with an extra dice and 3'' more movement can let you reach the shooters one turn before stalkers but as you say stalkers attack stronger and can get +1 save while getting close to enemy.
I think katakrosian deathglaive can help stalkers but I don't know if 80 points worth 6'' because I didn't actually play a real match yet.
Also, is nagash good enough for his points? I want to get to 2000 points as fast as I can and nagash takes a really high point for it's real money cost. Is it wise to play him just for his points? Bonereapers are already low on numbers and he makes it even worse so he has to be really good to make up for it and I don't want to lose every game just to save some money.