As of late I've been playing ep and no, I am not an expert by any means. But I did build him pure magic, despite him being a mainly support ep. Magic affects heals and you want to be able to heal efficiently in any situation that calls for it. I considered HA for a bit, but decided against it for that reason. A cleric only gets 10 hp per vit and the defense boost you get from it is not very much to justify it. It's not a horrible build, just have to think: does that bit of hp/def seem worth losing heal power for? You can have a shit ton of -ct gear, but if you only heal for 100, what's the use?
*Obviously exaggerating on the 100hp heal
However, you can only experiment on your own and do a build that works for you. I do agree on using the dragon top.