A build should answer one simple question: how do you want to fight most of the time? Start there, then support that style with enough survivability and coherent stats.
Choose the combat style first
Pick whether you prefer close-range pressure, ranged options, heavy hits, faster attacks or a hybrid approach.
Use a weapon to define the core requirements
A favorite weapon or weapon class gives the build a practical center.
Build enough survivability to learn
Damage only helps if you survive long enough to use it.
Keep stat investment focused
Avoid spreading levels across several unrelated damage paths before the core build works.