So, this is where your construction bonus site is, eh? Or perhaps you have more scattered around. Are there walls around a Wizard's Tower? I don't think so, but I forget.
My vine bow didn't seem to work (i.e. entangle) Turin's Golem as he destroyed my army. The Golem had Luck, Ethereal and Astral Shield cast. I didn't see the Entangle animation. Maybe the Astral Shield hid it, but I doubt it. The Golem seemed to attack every turn. Even with high strength, shouldn't it have been entangled for at least one turn per entanglement?
In my battle replay the centaur shot only once, after casting blessing. Then my golem got into melee range and the centaur started attacking with melee.