RESULTS: Tyranids vs Necrons vs Orks vs Blood angels

 I recently went to war with a couple of friends. It was a 4 way, roughly 1000 point battle, (we weren't too strict, being eager to start). Here are the armies, followed by results.

TYRANIDS

1 Tyrant Guard w rending claws and spinefists
1 Carnifex with scything talons, barbed strangler, enhanced senses, toxin sacs, adrenal glands and spore cysts (with mycetic spore for deep striking)
1 squad of 3 Warriors all with scything talons, 1 w venom cannon, 1 w deatspitter and 1 w devourer
2 squads of 10 termagants with fleshborers and extended carapace
1 squad of 8 hormagaunts with adrenal glands
1 squad of 8 Genestealers
3 Ripper Swarms
Spore mines (2 spore markers, 2 bioacid spore mines, 1 toxin mine and 3 frag mines)
Hive

BLOOD ANGELS

Mephiston Lord of Death with plasma pistol and Sanguine sword
1 Tactical squad
1 Devastator squad with 2 lascannons
1 Terminator squad
1 scout squad with snipers
Dreadnought with drop pod

NECRONS

1 Doomsday Ark
3 squads of 12 warriors
1 squad of Deathmarks
1 Overlord with Resurrection Orb
5 scarab swarms

ORKS

1 Warboss with Shoota and Power Klaw
4 Deffkoptas
1 Squad of boyz 1 with big shoota
1 squad of Nobz

Pretty much everyone ganged up on the poor Necrons, seeing them as a huge threat. This was good news for tyranids and blood angels, as tyranids thrive on outnumbering other armies, and with the Necrons thinned, they had an advantage. The Blood Angels were pleased because we hugely underestimated them; they are a massive threat. The Orks didn't  last long at all, charging into battle and being slaughtered, but taking an impressive two wounds off Mephiston with the Warboss.
The final result was
Blood Angels win, with scouts, mephiston, tactical squad, 1 terminator and mephiston still alive
Tyranids 2nd
Necrons 3rd
Orks 4th

BLOOD ANGELS ARE SO UNFAIR!