Sure, I'll give it a go. Not particularly familiar with artificers though.
Well, flavour, prerequisites, and skills seem to fit.
Third, while I'd expect you may only activate a single dormant infusion at a time with a swift action, that isn't entirely clear.
At fifth level, the dormant infusions may be expended for defence. As an immediate action, you may activate any number of dormant infusions you have. However, instead of gaining their normal benefits, you gain a bonus to AC and an amount of DR/- equal to half the combine spell levels of the infusions you are activating. These stack with other sources of AC and DR/-. These benefits last until the start of your next turn.
Now to finish reviewing the dances from Dancer of the Threshold:
Edit: Also, added a more noticeable capstone for the Sower of Strangeness. See Seed the Land ability for details.