Apart from the heavy support slots, that's just about the standard tournament build for Tyranids.
Two flying hive tyrants and two or three Tervigons should be in pretty much every competitive list. Trygons are still quite good, and some people have success with Dakkafexes (carnifex with devourers).
A lot of armies lack the high strength, low ap firepower needed to go through that many wounds. Iron Arm on the psykers (Tyrants and Tervigons) can easily win games. A toughness 9, flying Hive Tyrant is nearly unstoppable to a lot of armies.
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