The sooner you pop Lucid the sooner it's off CD for reuse, and the more mana you have. And I'm not against PIE build but you shouldn't need to Ewer yourself unless things got unusually crazy (or maybe you happen to be going crazy on Gravity).

For stats, Direct Hit for DPSing, PIE as needed, but we don't have stat weights so CRIT/DET/SS are all debatable. I personally am a fan of Crit as it can potentially save a life/time/MP, but if you're in Diurnal a lot then SS can make those regents tic harder giving you more time for other things like DPSing, and I read somewhere that DET is currently looking strongest but take that with a grain of salt. Even if we do get solid stat weights keep in mind that healing isn't about overall output.