Well actually imbued energies is only 1ss, and it's real value is that you'r almost always going to make use of it, either by using it for an extra AP, or by dying and gaining extra cards.
Also, I don't have my cards in front of me, but isn't the student 4ss? Which would be 5ss for non outcasts? Either way, it's a little pricey, although if you can consistently gain fast on your master every turn, thats 5 turns of fast, which essentially works out to 5ss worth of embed energies, except your using up your totem slot instead of an upgrade slot. With it being a 2AP action, it's very difficult getting 5 turns of fast on many of our masters with the possible exception of Raspy and maybe Colette.
I haven't tried it out personally, but it seems like the torakage would work quite well in a Colette list. First off he's has a decent ranged attack, which a general colette list sometimes lacks. You can make use of the doves to really boost his rapid fire, which could also benefit from his "works best alone" ability to gain a ++ on either attack or damage flips. Also "works best alone" is not activation specific and thus still gains the benefits while being prompted from colette. He has poison on both his attacks which synergies well with the performers. His relocate and leaf step auto trigger allows him some extreme mobility when combined with prompt allowing him to maintain offence and speed. Prompt also allows him to gain benefit from "one in the crowd" as she can prompt him away to gain his "work best alone" and then at the end of his activation, he can use his leaf step trigger to move back to gain his "one in the crowd" ability. Really seems like a bargain for 7ss