Blinding Flash is covered by Debuffing Skills (it's a renamed version of the old -physical resistance legacy).
As for the resistance types, doesn't really matter one way or the other. Afaik there's 4 different resistance types that affect how much chance a mob has to Resist a tactical attack (yeah, the re-use of terms doesn't make it easier). There seems to be a small difference based on the typical use, from hard to easy to resist it seems to be Song, Physical, Tactical and Cry, where Song and Physical are mostly used for debuffs (so it's better if they don't Resist too often), while Tactical is a mix and Cry is used for damage and taunts.
Ingaras, lvl 75 Elven Hunter; and others... The Western Alliance, Laurelin "The priority now is the store not the game. The store no longer supports the game, its the other way around."