What will happen if I attack with Searing Spear Askari and my opponent blocks it with Dream Fighter?

Options:
a) both Askari and Fighter phase out before flanking takes effect,
b) flanking takes effect first and Fighter leaves play (dies), however Askari phases out.

Based on the Mirage FAQ I think that (b) is correct, but not sure and would appreciate if someone could confirm this.

Q: What effects can happen between assigning a creature to block Dream Fighter and the creatures phasing out?
A: Dream Fighter's ability is a triggered effect, so only other triggered effects (and mana sources) can be played before Dream Fighter and the creature blocking it or blocked by it phase out. The phasing takes place even if an effect like flanking causes Dream Fighter to leave play.