You're playing a Dark Angels player, and they've got a Deathwing command squad, Cpt. Belial and a Terminator Chaplain. How do you respond (depending on if you setup first or second)?

I'm a Tyranid player who keeps getting my ass handed to me by said unit. I can't just ignore it and rush his main force as it's got enough firepower to threaten my Synapse creatures, and whilst spamming respawning Gaunts have proved effective it gives up too many kill points in Annihilation missions.

I'm going to try putting a unit of Genestealers in reserve (not Outflanking) to counter them, until I finish my Flying Warriors with 2 Lash Whips Each unit...