I don't know what models you have but here's a list I think it's going to be both competitive and enjoyable (
IMHO) :
Hq:
Coteaz (Divination) 100
Elites:
Techmarine w/ rad grenades 100
Troops:
1st Henchmen Squad : 3x Plasma Cannon Servitors + 2x Space Monkeys + 4x Crusaders 190 (Coteaz here)
2nd Henchmen Squad : 4x Crusaders + 7x Death Cult Assassins 165 (Techmarine here)
3rd Henchmen Squad : 3x Bolter Warrior Acolytes in a Razorback w/
TL Heavy bolter + psybolt ammo 65
4th Henchmen Squad : 3x Bolter Warrior Acolytes in a Razorback w/
TL Heavy bolter + psybolt ammo 65
Heavy Support:
DK w/ Heavy Incinarator + Personal Teleporter 235
DK w/ Heavy Incinarator + Personal Teleporter 235
Land Raider Redeemer w/ Assault cannon + 2x Flamestorm Cannons 245 (Techmarine + 2nd Henchmen Squad here)
Fortifications:
ADL w/ Icarus Lascannon 85 (Coteaz mans the gun and carefull placement of your crusaders behind
ADL and Heavy weapons behind them)
The above units come at 1485 points so with the remaining 15 points you can take phychotoke grenades for the Techmarine or Psyflame for the
LR or reduce the Death Cult Assassins to 6 and give a sword to one
DK and Psybolt to the
LR .. Your choice
Hope this helped ! Good Luck in there !