I'm trying to figure out what all your opinions are on the whole Vanilla CSM vs Plague Marines.
I used to be a huge advocate for small plague marine squads, as FnP definitely helps out a lot. However, there seem to be too many low ap/high strength weapons out there nowadays, which would force an invul save anyways and thus negate FnP.
My past few games I have been taking 10 man CSM squads with two special weapons (either meltas or plasmas) and have been having great success with the mere swarm of bodies to take high power hits.
Also with Mark of Chaos Glory it lets you reroll all morale checks, so with Ld 10 you really shouldn't be failing anything, whether it's from shooting or combat.
CSM are way cheaper like this but I wanted to know all your opinions on this.