You may have heard about Ben Cromwell's list that just beat ~170 others at the Bay Area Open:
Lion’s Blade Strike Force
Company Master: (Warlord) Fist, Artificer Armor
Chaplain: Bike, Auspex
Tactical Squad: Rhino, Grav-Cannon,
Tactical Squad: Rhino, Multi-Melta
Tactical Squad: Razorback (HB), Heavy Bolter
Tactical Squad: Razorback (HB)
Tactical Squad: Razorback (HB)
Tactical Squad: Pod, Melta/Combi-Melta
Assault Squad: 2x Flamers, Pod
Assault Squad: 2x Flamers, Pod
Devastator Squad: Rhino, Grav-Cannon
Devastator Squad: Rhino, Grav-Cannon
Scouts
Ravenwing Strike Force
Techmarine: Bike, Auspex
Ravenwing Command Squad: 5 Black Knights, Apothecary, 5 Plasma Talons, Grenade Launcher
Ravenwing Black Knight Squad: 5 Black Knights, Huntmaster, 5 Plasma Talons, Grenade Launcher
Ravenwing Darkshroud
that's really lean; not a point wasted. Maybe there's some ideas there for you.