So my list is themed, but I don't want to get obliterated haha. I'd rather have fun then slaughter all with cheese.
My list is based somewhat like a recon unit calling in Close Air Support...
Dark Angels Primary
HQ- Ezekiel
Techmarine
Troops- 8 scouts with sniper rifles and cloaks.
10 Scouts, 5 snipers and 2 shotguns and 3 bolters (combat squad most likely)
Fast- Nephilim with Lascannon
Nephilim with Lascannon
Allies- Militarum Tempestus
HQ- Command Squad with 3 hot shot volley guns
Troops- 6 Scions
Fast- Valkyrie with Lascannon and 2 hellstrike missiles, the one time use "battle cannon shots"
Imperial Knight attachment
Knight Paladin, the rapid fire battle cannon guy.
I feel like I have Something that can take down every potential item, FMC, Flyers, Land Raiders, hoardes. Maybe not efficiently though.
Now Ezekiel and Techmarine can be with different units to offer a 2+ save to the scouts, and a IC look out sir if needed. The scions I dropped all equipment so they are more effective with orders and the command squad becomes a firebase of 12 S4 AP3 shots at 24". With this I can cause W to any model out there and have large blasts deal with masses. We'll see how it does hopefully tomorrow.