There are way too many obstacles, and the larger hulls lack agility to dodge them. I ran into four lines of rocks with laser boxes in between. This does so much damage to the hull that it is impossible to reach the magma/energy layer sometimes.
i hate how when if you get a OP combo at p1 at last boss, and kill that, the rest of the combo is cancelled ... there goes my 15+ combo inc bombs and big bangs