I do have a couple of tricks to deal with a single big rushing creature, i'm not scared in the least of that. The plan is very flexible, i could very well Teleport trap, spiked pit or even turn it to stone, stop summoning golems and start spamming low level attack spells from wand + tower (hurl rock is excellent for the purpose)
Being pushed through a Wall of Thorns scares me a little more because it's really something you cannot counter, either you already had armor out or you get a lot of damage. I'm actually considering including the eagleclaw boots.