Engineering leveling guide
Engineering in Cata Classic runs from 450 to 525 on Obsidium, Elementium and a few volatiles, which makes Mining the natural partner. Many recipes give several points at once, so you build far fewer items than in earlier expansions. Counts are approximate: a recipe can turn green a few points earlier or later.
What to gather or buy
| Material | About |
|---|---|
 Volatile Air |
44 |
 Obsidium Bar |
145 |
 Elementium Bar |
150 |
 Hardened Elementium Bar |
9 |
 Volatile Earth |
12 |
 Volatile Fire |
10 |
 Embersilk Cloth |
40 |
 Dream Emerald |
4 |
Make about 22 
Electrified Ether on the first step, since later recipes use them. 
Handful of Obsidium Bolts takes 2 Obsidium Bar each, and the route needs about 55. Dream Emerald comes from a jewelcrafter or an alchemist.
Route
| Skill | Craft | Per craft |
|---|---|---|
| 450-460 | Electrified Ether |
2 Volatile Air |
| 460-470 |  Safety Catch Removal Kit |
10 Obsidium Bar, 10 Handful of Obsidium Bolts |
| 470-475 |  High-Powered Bolt Gun |
10 Obsidium Bar, 8 Handful of Obsidium Bolts, 4 Electrified Ether |
| 475-490 |  Lure Master Tackle Box |
20 Elementium Bar, 4 Handful of Obsidium Bolts |
| 490-495 |  Elementium Toolbox |
15 Elementium Bar, 12 Volatile Earth |
| 495-505 |  Elementium Dragonling |
2 Handful of Obsidium Bolts, 8 Electrified Ether, 16 Elementium Bar, 20 Embersilk Cloth |
| 505-510 |  Finely-Tuned Throat Needler |
2 Electrified Ether, 4 Obsidium Bar, 5 Hardened Elementium Bar |
| 510-517 |  Heat-Treated Spinning Lure |
Handful of Obsidium Bolts, 4 Elementium Bar, Volatile Fire |
| 517-525 |  Gnomish X-Ray Scope |
2 Hardened Elementium Bar, 2 Dream Emerald |
Trainers and tips
- Illustrious Grand Master Engineering is taught by the engineering trainers in the capital cities, such as Stormwind City and Orgrimmar, from character level 75.
- R19 Threatfinder works as well as Safety Catch Removal Kit on the 460-470 step if you have
Alicite to spare. - Lure Master Tackle Box and Elementium Dragonling are useful to keep, so not every item on this route goes to a vendor.