Blackspine:
as much as it pains me to say; Drop the GW from the BC.
they’re pretty much worthless. Shields hold the line a LOT better. T5, 2+/6+ as is worlds better. I’ve held up some nasty units with it. The GW don’t even get to swing half the time. They don’t have the attacks to dig deep.
I’d split the 2 BC units and put pressure on flanks
drop the Fireborn, as they’re quick to die due to ‘burning bright’. Very quick.
with those points, I’d fill out core with 1-2 blocks of HG.
1-2 HG khan.
Think about a flying Castellan. If you drop the FB you have the points.