At level 35, you can make Adamantine Whetstones, Adamantine Sharpening Stones, and Adamantine Rods to 360, also your skill 350 specialty Bop epic weapons or armor to get the last point or two to 360. At 360 you can now make Sternum Rods to 375.
You can start in on the Cobalt items, beginning at 350 with the Cobalt Skeleton Keys, the Cobalt Triangle Shield, a cheap tanking shield likely to be popular, Grand Fantasia Gold along with the Cobalt Shoulders and Bracers. The Cobalt set may be popular with new Death Knight Tanks looking for cheap tanking gear and they reach level 70. At 370 you get the Cobalt Gauntlets, Leg plates, and Helm. At 375, you have the Cobalt Chest piece. Those will take you to 395. You do not need to make any of the rare or epic level 70 items to skill up no longer, although the rare armor sets may still sell well. Demand will be low for the costly epics. Those the mid 70s can also try to get the 4 Bop dropped Reinforced Cobalt armor plans, which only require 4 cobalt bars to make and skill 375.