Hercules is a poor choice for Wind since it gets access to a "free" -20% DEF down from Hraesvelg (though this can and does miss). Shingen gains/loses 10% damage vs. Hercules by equipping Ambush or not, but meanwhile always has access to Provisional Forest and fast Burst generation. The Herc build, meanwhile, will be sort of handicapped without Provisional Forest equipped, though the DEF debuff sounds more reliable than Hraesvelg's?