It’d be best to reform your writing habits first I believe,
as it doesn’t look that good to have to read such a huge wall of text.
About your Class choices: It’s really hard to say anything certain yet, because the game itself is getting some heavy rebalancing ± every week on the Korean test server (kTest for short) which are scheduled to reach here by ~end of summer this year.
From the current looks, the game seems to be heading into a somewhat confusing direction with buffs, as they mostly stem from the casters SPR now.
For Priests current status[on kTest], Blessing is buffed greatly and becomes very useful, while Aspersion is nearly useless.
Heals are also gradually becoming more important, as it’s harder to mitigate damage through evasion and defence alone.
This makes Priest the best solution for support, as it offers Heal[Mass Heal], damage boost[mainly Blessing], some damage [Exorcise gets better at dealing damage] and survival [Revival/Resurrection].
Chaplain is ± the natural advancement from Priest C3 for it offering Last Rites (i.e. another line of damage), Magnus Exorcismus and Capella.
However, if you can live without mentioned skills, Dievdirbys C1 might also be a wise choice, offering the only CD time reduction skill, a “free” town warp, SP cost reduction [the SP costs explode in the future unless you have tons of SPR] and a nice attack skill.
About Kabbalist/Inquisitor: It might be worth mentioning that although Kabbalist might be somewhat decent with Ein Sofs attribute ability to double incoming healing via Heal/Mass Heal and recover SP,too, via attribute, that’s about it if we talk about how useful this Class is.
I’m running a Kabba C2 as a main[currently not active but following the changes on Kabbalist attentively] so I know what I talk about.
If you really want Kabbalist C1 just for Ein Sof, that’s ± ok, but that’s about it.
You could e.g. get Miko instead and have some damage&ability to cure status ailments [as Priest/Cleric/Chaplain/Inquisitor offers none of these except for Cure]/remove enemy buffs via Gohei. Miko also increases the level of ground target spells via Houki Broom, so another boost for your Cleric&Priest skills.
About Inquisitor: If you don’t want to deal damage this Class is ± not for you. Even after the changes, Inquisitor is still the personification of damage dealer in the Cleric tree. The only supportive ability is the Malleus Maleficarum debuff, but I’m not sure if it’s still as potent as before because most monsters got a huge downgrade HP-/defence-/statwise.
If you’re keen on supporting, you could get e.g. Krivis C1 instead, and go for Aukuras, Daino and Zalciai.
Daino will help you with managing your huge buffcount[basically all Priest supportskills] no matter the build, while Zalciai (a buff) helps with some extra damage through crits [it increases critical attack based on your SPR and decreases the enemies critical resistance].
Aukuras helps mitigating damage [decreases the enemies accuracy near it] and reducing debuff durations while near the flame.
Other options could be Plague Doctor [more Heal with Healing Factor/status immunity with Bloodletting/status removal via Fumigate]
,
Pardoner [can cure status ailments/increase debuff duration/increase magic defence based on your SPR(though only good in combination with Dievdirbys because of the high CD time and low duration)] or
Oracle [debuff immunity (less potent than Plague Doctor; also, has a count limit and low duration on level 1-6), Magic damage immunity (only good in combination with Dievdirbys due to the high CD time{3 times as high as the duration}),
utility (Forecast shows the AoE of some monster skills and gives 5% chance to negate damage via attribute; Clairvoyance&Resetting help with farming items)].
All in all it’s really hard to give you a solid build for the future, but then again, there will be a daily stat&Rank reset event in the future once these changes hit so it doesn’t really matter what you build until then.
Until then it’s probably best to go with your base choices [i.e. Cleric2>Priest3>Chaplain>x>Inquisitor] to reduce leveling stress and reach max level before the rebalancing hits iTOS.
