I see. I didn't use Ectopsychic Crush, and maybe I should've. I tried Antipathetic Beam, but it was difficult to use, and I gave up. Toward mid-game I stopped using any attacks that had friendly damage potential - except maybe Slicken on the Wizard.
Ectopsychic Echo is great. Foe only, does a total of 200-300 damage* over 10 seconds and if positioned well it can hit a lot of enemies. It works particularly well if you use a Barbarian/Fighter/Monk to use their charge/jump ability to get behind enemy lines, allowing you to get a really good beam attached to them.
*Obviously this has to defeat the enemy's Crush DR ten times since it's ten separate hits, but it's still very good damage.