And ways to increase it. Does he get to use Warp Surge or the psychic power that also boosts inv. by 1? (last one is tzeentch though I think).
Meanwhile Pask gets... to order himself a -1 and get a psyker to put another -1 on him? I guess thats not nothing, but still getting no save vs Melta and saving on 6s against most anti-tank is junk, specially since if he gets tied up in melee (and Cadian static playstyle tends to lead to this) he has no way of getting himself out of it.