You are silly.Re-roll on Ld 10 is better than Fearless at times.
UNMODIFIED rerollable LD10 is better than fearless. ANSKNF is better than fearless. A leadership score is WORSE then fearless
Let's say you lose against not doomed banshees, they kill five.
You are now re-rolling on ld5. If you fail both you wipe.
If you're fearless? Five armor saves. You lose two guys and get to swing a fist next turn, or tie them up.
ATSKNF? You either book it and shoot them in the face or go to fearless wounds
If you're a sister of battle you roll ld10 and laugh at their stupid banshee faces
Getting your squad handed to you for two failed morale checks in combat at half strength is dildos.
Best case scenario:you avoid taking armor saves(Which you aren't afraid of anyway, you're a marine)
Worst case scenario: you effing explode, no save.
You take this so they can cry on objectives for 85 points.IoCG is the only icon to take on basic CSMs IMHO.
But you really should be taking plague marines or zerkers.