The main issue here is not so much that save though. It's the combination of that save with excessive firepower. Against those kind of threats it doesn't matter much what you field, it's going to be costly. The Obvious solution being to get rid of whatever is buffing them before even attempting to deal with the big scary thing. Anyways, my point was mostly that they should be able to deal with extreme saves, as you can see by that treelord losing up to about half his health. However, the combination of extreme saves and high firepower tends to be something we're terrible at dealing with as we have very few things capable of doing the same and thus have very little that can actually go toe to toe with something like that, as made evident by that blob of 40 probably being annihilated in a turn or two. Frankly our big dinosaurs could use a buff in that aspect, or they should just be more common (that behemoth limit is rather lame for our army).