PoE casablanca001 builds

its not my build i just get inspire by "owen" in youtube i what know how i can make this build do more dps or its just skill limitation im cleaning everything except uberboss since its very off meta build i craft everything any sugresstion how i can improvite

i never play lightning strick i decide to try it with the new unique but the dps is no that good ( first time make/play melee build ) how i can improve it ? :D