You don't want to use staff as your main weapon, but it's a great filler. Combo fields are amazing with the staff. The staff offers great utility, it's really a must-have for me. Dagger/Wells builds are out there, but they aren't that great. There are better builds, honestly. My main problem with the dagger is the fact you're in melee range, and it makes you incredibly vulnerable. For PvP that's not a huge issue, as you're probably in melee range most of the time anyway, but in PvE, it can be awful unless you're really good at dodging.