You really should go what you like the most.
With that being said however personally i would recommend grabbing a rank 6-8 class instead as their modifiers are just that much better and with Cleric2 Plus Preist 1 is plenty support add in Diev3 and your almost pure support most teams benefit more from faster fights vs having loads of healing so its always good to give some bite to your build.
Reccomended
Oracle:
For PvP interesting skills pairs well with Diev and Miko doesn’t add much damage but denies plenty. (Probably wouldn’t recommend this one unless your full Con and run with a good group)
Plague Doctor:
Pairs better in some other builds but if you are going Int this could be an amazing choice as it would round out your ability to dispel higher level spells while give fairly substantial damage with an int build even at C1 if i’m not mistaken and healing factor is no joke giveing you more support just like you wanted plus damage which imo you need.
Inquisitor:
Just great damage not necessarily a great combo with you build but you could go more of a mage killer build could be interesting.
Taoist:
Not frequently picked but based on your choices so far this is more or less the natural progression for your class. From what i understand you want to be an int build for Taoist. Taoist seems like a really great class and shouldn’t be underestimated especially as you will be bringing something to groups that isn’t readily available. I just feel they get over shadowed by Inquisitors as most builds do a lot with the class.
Optional
Druid:
Could work amazing with rank 9 pairs very well with Diev good mana spender should give you some extra dps however would need to be C2 for transform which isn’t possible so more of a future choice.
Kabbalist:
Would help for both PvP and PvE kind of a mixed bag gives some damage but not very good damage late game instant full mana refill plus extra health and 7 sided strike are all very useful.
