The rocket boots you mentioned are the product of engineering, which is a very interesting professional skill. The current version can do many things: rocket boots, launchers, parachute cloaks, motorcycle mounts, helicopter mounts, permanent repair robots, mailboxes that can be placed everywhere, pacemakers and many other interesting things.

Jewelry processing is also very advantageous, and it can make better stones than others to enhance its attributes.

Alchemy can be used to make colorful gems, rough stones and various potions. Level 70 alchemy can be used as a decoration, and level 80 is gone.

Mining can give the character more endurance, which increases according to the increase of your mining skill points.

You can use an active skill to give yourself continuous blood transfusion, but the effect is very tasteless.

Forging can be used to lock deck armor equipment. A great feature of the current forging version is that one more hole can be punched in the equipment, so that one more gem can be inserted.

Tailors can make flying carpet mounts and enchanted items (spells) on their legs. There are also enchanted products that create higher attributes for their own equipment.

Leather can be used to enchant legs (Physics Department).

Enchants don't treat themselves well. Serve the people. -

That's about it. You can search for drawings of various skills and have a simple look. I believe you will know more.