As usual, early into every patch, we aim to get the highest ilvl items first purely because of raw intellect gain that outweighs perfect secondary stats on items.
The most important thing is to get the 4 set as soon as possible. The set isn't crazy good but still provides good value thanks to the interaction with our best secondary stat, which is crit.
Restoration shaman 4pc increases the effectiveness of our critical strike healing from 200% to 215%.
When it comes to crafted gear and spending Spark of Ingenuity, I'd suggest following a simple rule. If your weapon is low ilvl, go for Primal Molten Spellblade or Obsidian Seared Runeaxe with Magazine of Healing Darts or Potion Absorption Inhibitor as embellishment to get a huge intellect boost. Then get Elemental Larial, as it's an insane boost to our secondary stats. After that, it's nice to craft Alacritous Alchemist Stone if your trinkets are still pretty bad.