Zenas Expanse has high drop rates for the anomalies needed for Aegis Gear sets. That is all.
If you are crafting for your new char I have no suggestions. If you are going to level your character in crafting its easiest if:
Each rank increase first craft all of the schematics you are going to craft from
Craft the items you want for that tier
Allows you to slowly progress instead of one big time sink, and it worked pretty well for me on my newer toon without waisting a whole lot of samples.