So you need ascended armor to maximize your damage output and want to craft yours but you don't know where to start and you need a good fast guide with lowest amount of a gold sink?
Check https://gw2crafts.net/.
Cheap, easy to checklist and widely used amongst players.
Follow the guide of your crafting discipline!
NOTE: You can switch your profession (crafting discipline) for a few silver (it adds if changed alot)
beside the fact you can hold two professions. You also keep your level when switching!
Tip: When crafting ascended armor or weaponry for the first time, make sure to craft the cheapest set! you can change your attributes in the mystic forge later and save some gold this way.
1 Ascended armor, 1 Anthology of Heroes, 5 Glob of Ectoplasm, 1 Master insignia
Drop those into the forge (see Ascended armor - Guild Wars 2 Wiki (GW2W) for more info)
Good luck and happy crafting!
Another good site is https://gw2efficiency.com/
Everything needed for a light Viper ascended
https://gw2efficiency.com/crafting/calculator/a~0!b~0!c~0!d~1-71436;1-73852;1-73225;1-75378;1-74264;1-75770