Ring of thorns was rarely useful and did less damage than Doom Spike. In AE you should use Doom Spike over Ring of Thorns, the only time I would ever use RoT was if the mobs happened to be spread out in a circle or in a way I could not hit the majority with a Doom Spike.

Power Sure was nice imo only for the weaving of it into the gcd. That is my main concern atm is we are losing 2 off gcds and with a massive gcd this game has I am afraid it will make the rotation boring. But, we will see.