So, within the Entangling Roots specialization, there’s a skill called Rooted System.
Rooted System: Entangling Roots now casts from the nearest totem to your cursor.
This specific skill is not working through thorn totems or healing totems. Unfortunately, I cannot test the storm totem but I’m assuming it wouldn’t work with that particular totem either. Which means, it cannot synergize with Frenzying Thorns within the tree as well, which is unfortunate.