here guys some info tested on the pts version in the russian innova servers. https://4gameforum.ru/showthread.php?t=384243&page=91 post - #1810 a little bit furhter when tested with clan skills etc. people will still have a bit more p def with heavy and knight than robe with knight si it is still a question of preferences.
if i would play healer i would use robe definitely. or you can keep running with heavy set, which bonus not applied because healer don't have heavy mastery and lose casting speed, healing power, pdef, mdef, m.atk, 5k-10k hp.
on #1810, 6 pdef more on robe with knight, 400 with wizard, but don't forget the mdef and hp bonus aswell, as others. considering that daggers have been doing 1-stab (full hp) and people have been dying with cp full from what i heard from ncwest, i guess the hp will come in handy sometimes.