Erebite scarcity has broken some recipes

[Greentryst]

I just noticed that my report is partially a duplicate. Rhydic also described the erebite problem in his overall mining bug report. Sorry I overlooked that! On the plus side, this report still has some use: verifying Rhydic's experiences with erebite, covering both affected recipes, and suggesting fixes.

(also Rhydic has a really good point about his fourth issue)