I've got a Flier Emblem team set up with Spring Camilla at the head, wielding the mighty Gronnblade+, which adds all buffs as raw damage when calculating her attack power. As in all Flier Emblem teams, I've also got a Flier (Caeda) with Fortify Fliers and a Flier (Hinoka) with Hone Fliers. Lastly, I've got either Cordelia or Cherche with Goad Fliers, but since the Arena currently has Summer Robin as a bonus unit, I've replaced the last position in my roster with her, who has Hone Spd 3.
However, when doing Arena challenges, I noticed something. Not all of the buffs were being added to Spring Camilla's damage. This didn't usually matter, as she tends to reach 70-85 damage on a single hit, but Summer Robin's Hone Spd 3 didn't seem to add anything to Spring Camilla's attack. The buffs from Fortify/Hone Fliers definitely added onto her attack, though.
Which buffs affect the -blade (Gronnblade, Blarblade, Rauorblade) tomes? I assume the buff from skills like Fury or Life & Death that passively affect stats do not affect the damage, while the Hone/Fortify/Ward skills that add buffs at the beginning of each turn do. What about the Hone skills that only add buffs for adjacent or nearby allies during combat?