1: Heal should be buffed up 3x (~21k without Bascojins, ~60k with Bascojins---Putting it in perspective with our type of healers, it's not too bad). At the moment, it is a useless skill that is out done by the bountiful amount of Yggdrasil berries/seeds on this server. It should be of some use- at least to the priest himself.
2: With the nerf of Sanctuary a couple of months back (actually almost a year), it destroyed the Bascojin economy as well as the utility of priests during WoE. This skill should be restored to its former self. Nothing more and nothing less.
3: Regarding scarves, I have mixed opinions. I believe that if Acolyte class received the benefits, other classes such as GS, Taekwon, and Merchant should also receive it. In this way, it has more benefits than drawbacks by helping the weaker, unused classes on this server. Also, by making the scarves usable by every job, more people will vote for the server in order to obtain them.
4: Priests are more magic-based than they are melee-based (Suggesting to go melee with a Thanatos card is not a feasible response as the card is very rare). Being magic oriented, they should have an Elite rod/staff in order to increase the damage output of the Holy Light skill.
5: Because Priests have the skill Assumptio, I am uncertain whether they require an HP modification change. It think it is assumed that their HP modifier is a bit lower than expected because it is also expected that they will have Assumptio on themselves at all times.
6: As Xtopher said, "It's suppose to be an impenetrable area where all within are safe from outside attack". This skill also should be restored to its former self. As of now, it doesn't protect those within it, it makes them sitting ducks.
In all, I agree with Xtopher's suggestion on the Priest class.