Return of Reckoning

Both classes are good healers - DoK's have the option to heal using a Chalice or a Shield. You can also hybrid as a DPS as a DoK using DW swords (whilst still supporting with off-heals through lifetaps).

Zealots are your bread and butter heals - their DPS spec is currently questionable. (Zomega ...

So, I'm OwlGoesHoot and I really like to play healers!
Now what I need is some help on whether I should play a Zealot or a disciple of Khaine.
I am loving both (altho my disciple looks a lot cooler), I have no idea about their viability as supports, so I would need some honest opinions.
Difficulty ...