Necromancer tactics against Conflux.

This tactic has been tested over the years and has rarely failed me; it is designed for a quick victory – after leaving the castle, I rarely return.
-Yes, of course, you have to sacrifice other structures, but they might not even be needed; angels and wyverns are enough.
-We don't need vampires to make our lives easier; that's the job of the angels.
-Please tell me how and with what units can I break the "can" on week 2.