I have anecdotal evidence that it works. One of my teammates says he has a Tera Team of three LV1 Stantler and a Houndstone and that it gets disgustingly high damage after 2 rounds.
Looks like the play is 3 stantler. 3 Helping Hands. They all die and Houndstone has a 200 bp Last Respects. They do it again and its at 350. With the 3 helping hands, it is more than a triple boost.
If you're free to test it today, It's already in my queue. Let me know.