Collect & craft
Pick a goal, then spend Knowledge step by step — trees open on demand.
Profession tools and accessories for Engineering, Tailoring, Jewelcrafting, Fishing, and Mining.
Goggles, bracers, boots, and guns. This is where all your combat gear recipes are.
Improves Recycling yield and gives you Resourcefulness, Multicraft, and Ingenuity bonuses for all Engineering crafts. This is also where you get a big chunk of your crafting skill.
Bots, gadgets, and utility items. Also gives you extra procs when crafting or recycling reagents.
Spend Knowledge in this order. Open trees only when you need a visual.