I've been speaking to my friend about crafting and gotten some useful info. However some thins have fallen down. He almost has every craft at 46+ so he has access to extremely powerful skills.

I currently have every craft at 10, working on Blacksmithing 19+

I have a full set of gear going mad on Control due to some arcing problems at lower leveles. but I'm still having issues.

How high above my lv should I craft?
What food is best for low lv?
What crafting stat should I push?
Is it worth going for lower lv crafts that I can quality+ on for the EXP?
What skills are best from my low lv pool? I'm currently using makers muse and the 50% quality bonus skill.