Sustain worked 100% the way I want it to. It chunks a little bit of your hp to keep your fairy rolling through dot or light mob damage. Not only is it efficient, but it fits perfectly in the scholar toolkit of mp conservation, since it is essentially free heals. Now that sustain is being changed to consume mp, why shouldn't I just cast physick on my fairy to bypass the 10s HoT? I'm not sure what the point is in changing the dynamic of a very nice utility and making it obsolete