Whether to interpret "(heroes)", "(minions)" as a players of the alignment, or as a characters of the alignment, above rule fails.Roll the dice, add the character's unused direct influence, any standard modifications for the character's race (heroes) or the other factions in play (minions), (. . .)
In first case a FW is not covered, in second case Radagast's Black Bird is not covered and additionally it leads to conclusion that for Orcs and Trolls characters under control of FW Standard Modifications behave differently that for hero characters under control of FW.
"Roll the dice, add the character's unused direct influence, any standard modifications for the character's race (against hero faction) or the other factions in play (against minion faction), (. . .)"
would make a sense.