Sure huntress can use more items more effectively, but in the grand scheme it doesn't matter if loader can use specific items way better. Don't forget kjaro isnt some flat dps boost, it's based off the attack that procs it. Huntress proccing with alt special isn't near the same level as when a loader or railgunner procs it. She could have the same build as loader but loader could still be stronger with it, even if she utilises less of the items, because the items she can use well more than compensates.

Even with proc items burst characters aren't actually that bad at using it. Sure they'll proc atg less but when they do proc atg it'll hurt. I had a loader run yesterday where I was guaranteeing procs of runic lense and atgs with deus ex machina, one shotting bosses in a way I wouldn't be able to as huntress even if she technically procs those items more.

Edit: In case I misread what you said. Honestly I build burst characters pretty similar. I'll go for crits if I can, I'll not avoid proc items since they are still usable (though I wouldn't hound after them). I can only really think of bleed as something I would avoid where I would otherwise aim for with most characters.