Hey Dobster,
Thanks for sharing this. As I note in this thread, the original build I posted got nerfed insanely hard just a few days later, so thorn totems now feel terrible to self cast. As a result, I might follow your lead and look at ice thorns or other skills.
Have you tried dual wielding tempest maw? Those storm sprites are quite fun, and 8 of them might be worth giving up a shield and taking more damage for…