Plagues are good for support but it think Kabba can also be a good option. See it below:
Hey everybody, this is a build for end game/pvp based only to maintain the group members and yourselves alive preventing high incoming damage and some status ailments while keep a good healing and resistance.
Stats Points: CON/ INT/ SPR something like 1:3:1 or 1:2:2 respectively.
You can use Plate Armor for more resistance/HP or Cloth Armor for more SP.
NOTE: The Kabbalist class is because the Ein Sof skill who gives you 100% more HP at LV5.
Revenged Sevenfold: I think this skill not work properly because it not reflect back to the attacker 7x the damage received (or just reflect the damage you receive + the percentage of additional damage based on the skill level), but using with the attribute can inflict Curse on an enemy.
Merkabah: just because the others skills aren’t a good option for this build (and i did not like them u.u) and it can inflict pretification on enemies affected by Curse.
You can also choose the Plague Doctor class if you want for a character who can prevent more Status Ailments, i did not chose because the Oracle have the Prophecy skill who can prevent Lv1 Status Ailments, oracles also can block agressive/support magics using the Counter Spell skill (but it’s your decision).
PS: You can save 5 skills points to use after choose the same class to improve (this help a lot in case of the cleric class).
THANKS ALL , i hope i’ve been useful.