Several Crafting questions

[Zeronic]

I asked some questions before and got some great answers, yet time has passed, and since then I changed some things.
1st of all. Since I needed black alumen for LTW I leveled it to 40. I am not using any mats right now, but is it worth it to already bring it to 50?
2nd, on that note, I plan on leveling all crafting classes, so should I bring botany and fishing up to 50 as well first?
3th, gearing them. My LTW reached 50 but is stil lwalking around in lvl 38/41 gear, I see lots of people with green gear which I can also try to make myself. But I guess its hella expansive. How do people gear their endgame crafters(what to start on first etc).
4th, I leveled most of my crafters to 15 for their cross class abilities. What should I max out next? I have mining already to 40 so thought on blacksmithing, but I heard that carpentry's byregot blessing is a true well... blessing. What to do first (also regard the 2nd question).
5,th, and final one. I usually just craft base items(basic leathers, or making ingot from ores) to level it up. This gives me room for 40 durability. I always start with inner quiet. using steady hand, and then great strides + best touch available. I carefully watch quality, and use tricks of the trade when neccecary, I only need 1 synthesys step to finish an item of. Yet with base items I always end up around 30% HQ items.
What am I doing wrong here? Peiste skins are about 10 levels underneather me, yet I cannot even fully make them HQ.
What are your recommendations for 40 durability rotations? (or for higher ones, I usually use the steady hand + hasty touch combo to finish strong).
Thanks in advance for all the help.