NetEA or Epic UK list?
Assuming NetEA...
AV heavy is tough, as 10.2.1 is more of a mixed swarm. Something like this would work though. You might want some Zoanthropes in there for AA however.
Quote:
TYRANID SWARM (S) [420]
7 Termagants, Hive Tyrant, 4 Carnifex
TYRANID SWARM (S) [300]
6 Termagants, Hive Tyrant, 2 Haruspex
TYRANID SWARM (S) [300]
6 Termagants, Hive Tyrant, 2 Haruspex
TYRANID SWARM (S) [400]
6 Termagants, Hive Tyrant, 4 Carnifex
TYRANID SWARM (S) [200]
Two Tyranid Warriors, 6 Termagants
DACTYLIS SWARM (S) [400]
4 Dactylis
EXOCRINE SWARM (S) [225]
4 Exocrine
HARRIDAN SWARM (S) [230]
1 Harridan, 4 Gargoyles (745.M41)
LICTOR SWARM [200]
4 Lictor
TRYGON SWARM [300]
4 Trygon