Quick Q: Necros

[Chesspiece_face]

everyone knows about the inflamatory topic of skill synergies from marrow walks but does anyone know if the skills gained through use of the full trang ouls set synergize with each other? the set gives:

18 fireball
13 firewall
10 meteor
3 fire mastery

so do those fireballs and meteors synergize? also how significant is the FCR penalty for wearing this set?

thanks.