You're right on many accounts.
dump trucks of attacks
It's a real monster.
When you consider it's one of the best values out there, it becomes a 'no brainer' in many lists.
As a beastman player, If i KNEW I was running against it, I would try this
A doombull/ gorebull solo with the dragon helm and asf sword. Can't be thunderstomped, 2+ ward vs your fire, not bad. Plus good all around.
My main unit: Beast lord w/ blackened plate and flaming banner on Bestigors. 2+ ward vs fire on BL, 4+ on the unit, str 6 flaming attacks on the hydra means you shouldn't last more than one-2 rounds top, with minimal effect to me.
In magic phase? Ruby ring of ruin + Lore of beasts for "amber spear' with the hag-tree fetish (allows re-rolls on to wounds) Hit you with the ruby ring for flaming, take off regen, then huck the spear.
Maybe even toss some chariots your way just to hold you up.
Even causing a wound before you get your flaming attack helps a lot. S4 flaming is far less devastating than s5. Hell, I'd be overjoyed with s3, but that's asking a lot.
Do impact hits from doombull/mino or chariot get resolved before in combat shooting? Seems like it would...but don't know
How do you run your hydras? Are they there to support main blocks? Flankers? I'm dying to know as I'm getting m DE army off the ground.
I just got the 'rusted heroes' hydra in,
I'm pretty excited to use the guy
(I cannot stand the GW hydra)