Crafting tips?

Like the title suggests does anyone have any tips on how to craft mid-high level items? I am in the end game doing T-15 maps and i dont get much luck with currency drops, i must make anywhere from 2-4 divs per a full day of grinding maps and want to learn how to craft or flip items for extra currency but dont have the funds for things such as omens of light etc…

Are there any decent up to date guides on crafting items?

Which bases do i look for in drops to further expand upon?

What can i do crafting wise on such a low budget (0-10divs)?

Any help is appreciated!