Except Tomb Blades are FA and Immortals are Troops, fulfilling different roles within your FOC. I would've been completely fine with a compulsory 1 HQ, 2 Troops, 1 FA Detachment...I love my Scarabs!
EDIT: I have this wrong. Instant Death is a -1 modifier to your dice after they roll for RP, not to the RP roll. I'm still trying to figure out why RP bonuses are cumulative...
True though in a decurion FoC role is irrelevent, I mean I see it more like an HQ 2 troops and slightly better troops for slightly more points :D
OH yeah, I always assumed it would just apply to when Cryptek+Everliving with an ID weapon. Though its worded ambiguously IMO. Though it also says that certain rules apply modifiers to 'this dice roll' so when it says +1 to RP that is +1 to the roll for RP so would work in the way we originally thought.
Me: To be honest im amazed there isn't a chaos god of not revising or at least chaos god of procrastination
MidnightSun: There will be, when enough people do it. Y'know when the Eldar were all engaging in their hedonism and Slaanesh ripped open the Eye of Terror with his creation? Slaanesh will have NOTHING on the God of Procrastination, and his vile minions will carve the galaxy asunder in a thousand year reign of blood.... Tomorrow