Blacksmithing can be leveled to 300 quickly if you have a lot of gold and a thriving economy. If you don't have either of those two, I might recommend questing and farming materials. Below I describe the items to craft and at what level to craft them. All the numbers are best scenario, it is very unlikely that you will be able to, for instance, level from 216-225 by only making 10 Steel Plate Helms, you'll probably have to make 10-15. Since there is no way of knowing how many you will need to make to level up, I've provided numbers for both best-case and estimates. If you have a thriving economy, buy extras and sell back what you didn't use.

Please notice you will want to hold on to extra grinding stones, they are needed to become an Expert or Artisan in blacksmithing, and to reach level 300. Here is your shopping list:

Blacksmithing Stones
105-120 Rough
50-60 Coarse
75-100 Heavy
440-460 Solid
10-15 Dense
25-35 Lesser Moonstones

Blacksmithing Bars
270-320 Bronze
100-140 Iron
5-10 Silver
305-380 Steel
120-180 Mithril
540-620 Thorium

Blacksmithing Miscellaneous
20-30 Blue Power Crystals
80-120 Yellow Power Crystals
20-30 Star Rubies
 

 

Journeyman Blacksmithing
Levels	Craft	Coarse Stones	Rough Grinding Stones	Silver Bars	Bronze Bars	Heavy Stones
76-100	25 Coarse Grinding Stones	25
101-105	5 Silver Rods		10	5
106-125	20 Rough Bronze Leggings				120
126-150	25 Heavy Grinding Stones					75
	Totals:	25	10	5	120	75