It's however u wanna play, for sins, ds neck is good for aps, but for dph i'd say puzzle cube, to boost your surviving chance
As a EA, DS neck is best way to go, the more u deal/hit or skill, the faster the target dies, you have a low stun, lasts really really low, so you can't afford not killing the target fast enough. It's all about logic. If u'll be going to use a puzzle cube with def level bow and full def level r8 set(with defences like pdef/elemental and magic/physic damage reduce) , puzzle is ok.I prefer ds neck on EA, it's better. DS neck on the aps sin, puzzle on the dph one.