Pre-wrath? Well, that doesn't mean much given that ALL the tribulation is the "wrath of the Lamb," which is precisely what is said about the very beginning with the first seal.
MM
MM
6 These have authority to shut heaven, that rain fall not in the days of their prophecy, and they have authority over the waters to turn them into blood, and to smite the earth with every plague as often as they will.
Notice John uses [THESE] [THEY] (many) not them for just 2 Witnesses..