From everything I've read, you should not think of.the.Blastidon as a monster. Think of.them more as a support unit with a tail attack. I think your first list was better, I liked the.cav and think you can make them work. Put a couple scarves in and it will blow units up. maybe make them units of 5 instead. Powerfully enough that they can't be ignored, small enough that they won't draw a ton.of.attention.
Who the hell cares.
Winning at Warhammer is important, VERY important. It shows the entire universe how big your little toy soldiers' pee-pees are.
GOD WILLS IT
Tonight we dine in HELL