Any details on what's on the other army? I understand the need to go into his deployment zone but the big problem is, you're in his deployment zone.
This is especially problematic if he is fielding scarabs as whatever he is charging, will unfortunately, be getting wrecked.
The other issue is that the Heldrake does not need to zoom and so after the first turn they come on, there is no hiding from them or even going to ground (if they have the flamer, which they should)