WA vs Primary stat

So if I'm understanding this correctly, classes such as warriors + dual blades whose weapons have a much higher base attack than say pirates + NLs will naturally get more range with +5 stat than the latter assuming their base + equip + mw stats are roughly the same.

Characters with similar item availability (weapon only vs. weapon+shield, overall vs. top+bottom) will get about the same range per stat, but ones with higher basic attack get less per attack.

Two characters with ~3000 luk would both see the same damage increase from +30 luk (proportionally around 1% more damage). If one has 250 and the other has 400 attack, then +30 attack helps the lower attack one much more.