youll be surprised how many more hornmagaunts die than youd expect.
Id watch out for armies with whirlwinds and destructors (especially chaos ones with havoc launchers that can take out 10 a turn easily).
the last heat for the GT in my area was won by a shooty/combaty mix blood angels army with 12 heavy bolters and 3 twin linked assault cannons. You wont have much of a horde left after a turn of shooting from those weapons (look at it like this the 12 heavy bolters and 3 asscans kill an average of 13 MARINES a turn, let alone gaunts!)
though back on subject, id say a horde army is a good choice for a tourney, which is inevitably saturated with MEQ killer weapons, which give the horde troopers something of an advantage. Id be watchful for break/pinning tactics - take out the hive mind creatures and watch the gaunts scatter |