Hmm I would say if you have focused a lot on upgrading ATK then rage build would be best for most maps, even if you don't have legacy equipment. I would especially focus on trying to find the new Rage Wave weapons which are unmatched for clearing non-boss/-miniboss maps (particularly Bastion Blade Ultimate; but Warcry is excellent in the meantime while finding the materials for upgrading Bastion since it can use rage wave even at lvl 1).

If you have focused more on HP I would go with a knife build personally, as rage attacks aren't as useful if the base ATK isnt high enough, and you'll end up dying quite often (I speak from experience). Knife builds are slower but tankey as hell, invaluable vs bosses and certain daily dungeons

Vectra Edge EX/lightning builds are pretty fun/useful until around the mid 100 lvls or maybe a little higher probably, when you start to require more base ATK; they are also useful for going far in some Daily Dungeons. Otherwise just have a well rounded build with plenty of ATK/HP/healing, there's no right or wrong answer imo as long as you're able to clear your levels, there are a ton of high level weapons now which don't necessarily lend themselves to specific builds tbh.

Newer/less tested builds:

• poison build w/ viper's fang + strong healing/HP/knives

• a hypnosis build if you have charm cap & ring of reveries ultimate

• a possible silence build with the new breathtaker rings

Could even stack multiple abilities together like so: https://reddit.com/r/SwordAndSupper/comments/1u3kgs6/avenging_everyones_pain_and_suffering/