King of the Colosseum list

I need help making a King of the colosseum list for a friend. Im having difficulty putting one together he does not have any Scions so its hard to really make anything competitive and I dont want him to lose. This is what I came up with but im not sure if it will work. My thought is to have the Primaris Psyker join the Kasrkins to make them soak up more damage and increase their damage output with the maelstrom. The cadians are going to sticky as many objectives of possibles and the BullGryn are meant to hold a point. The issue is he will be playing against Drukari with transports, Blood Angels with very fast Close combat Units, Warrior Detachment Tyranids and more. Im not sure how this list will stack up.

(490 points)

Astra Militarum Incursion (1000 points) Combined Regiment

CHARACTERS

Cadian Command Squad (80 points) • 1x Cadian Commander • Warlord • 1x Plasma pistol 1x Power fist • Enhancement: Grand Strategist • 1x Cadian Veteran Guardsman • 1x Plasma gun 1x Plasma pistol • 1x Cadian Veteran Guardsman with Master Vox • 1x Close combat weapon 1x Lasgun 1x Master Vox • 1x Cadian Veteran Guardsman with Medi-pack • 1x Close combat weapon 1x Lasgun 1x Medi-pack • 1x Cadian Veteran Guardsman with Regimental Standard • 1x Close combat weapon 1x Lasgun 1x Regimental Standard

Primaris Psyker (60 points) • 1x Force weapon 1x Laspistol 1x Psychic Maelstrom

BATTLELINE

Cadian Shock Troops (65 points) • 1x Shock Trooper Sergeant • 1x Bolt pistol 1x Chainsword • 9x Shock Trooper • 9x Close combat weapon 7x Lasgun 1x Meltagun 1x Plasma gun 1x Vox-caster

Cadian Shock Troops (65 points) • 1x Shock Trooper Sergeant • 1x Bolt pistol 1x Chainsword • 9x Shock Trooper • 9x Close combat weapon 7x Lasgun 1x Meltagun 1x Plasma gun 1x Vox-caster

OTHER DATASHEETS

Bullgryn Squad (110 points) • 1x Bullgryn Bone ’ead • 1x Brute Shield 1x Bullgryn maul 1x Close combat weapon • 2x Bullgryn • 2x Brute Shield 2x Bullgryn maul 2x Close combat weapon

Kasrkin (110 points) • 1x Kasrkin Sergeant • 1x Plasma pistol 1x Power weapon • 9x Kasrkin • 9x Close combat weapon 4x Hot-shot lasgun 1x Hot-shot marksman rifle 2x Meltagun 2x Plasma gun 1x Vox-caster