2000 points
HQ: Tempestor Prime (Plasma Pistol, Power Sword)
HQ: Commissar Yarrick
Troops 1: Conscripts (30)
Troops 2: Scions (5) (Plasma Gun (2), Hotshot Lasgun (2), Hotshot Laspistol)
Troops 3: Scions (5) (Plasma Gun (2), Hotshot Lasgun (2), Hotshot Laspistol)
Troops 4: Scions (5) (Plasma Gun (2), Hotshot Lasgun (2), Hotshot Laspistol)
Troops 5: Scions (5) (Plasma Gun (2), Hotshot Lasgun (2), Hotshot Laspistol)
Troops 6: Scions (5) (Plasma Gun (2), Hotshot Lasgun (2), Hotshot Laspistol)
Super Heavy Auxiliary: Knight Crusader (Avenger Cannon, Rapidfire Battlecannon, Heavy Flamer, Heavy Stubber (2))
Dedicated Transport 1: Taurox Prime (Gatling Gun, Hotshot Volley Gun (2), Storm Bolter)
Dedicated Transport 2: Taurox Prime (Taurox Missile Launcher, Autocannon (2))
Dedicated Transport 3: Taurox Prime (Taurox Missile Launcher, Autocannon (2))
Dedicated Transport 4: Taurox Prime (Taurox Missile Launcher, Autocannon (2))
Dedicated Transport 5: Taurox Prime (Taurox Missile Launcher, Autocannon (2))
Dedicated Transport 6: Taurox Prime (Taurox Missile Launcher, Autocannon (2))
Taken from:
https://www.frontlinegaming.org/2017/06/14/wednesday-night-fight-scions-vs-tyranids/
Seems like a damn scary list, the amount of firepower at range the Taurox Prime put out (at that price too!); with a Knight to cover the front.
That said, it doesn't have the maximal Scion/Plasma spam, so perhaps it could be weak to more elite armies - that said, that many Krak/Frag missiles coming out, with autocannons to boot - no joke.