I will make this as short and simple as possible for ease of reading.
Dex builds are best for Pally Inq because it allows their Dmg spells which have long cool downs to crit and you need almost full dex to do so reliably. Str while it scales the damage hardly changes the numbers at higher levels while crit doubles them.
Str/Dex can be good for Monks however pure Dex is still often preferred as it gives overall more damage and survivability. Strength gives more of a flat benefit to your standard melee attacks which is great for monks however you lose much of its benefits if you do not focus on it solely. As dex is mostly needed late game you will then have to go a hybrid build which can hurt you in the longer run hence why most players are focusing dex now for big numbers.
You did right by going Cleric C2 i am rerolling my Pally C3 PD Inq now because i went Cleric C1 > Priest C2 > Pally C3 > PD C1 > Inq C1 my healing is too erratic to reliably heal a group at higher levels.
Pally:
I would suggest Cleric C2 > Priest C1 > Pally C3 > PD C1 > Inq C1 for pally as all your damage will be burst and your really not much of a DPSer your damage wont be ignorable but your going to be in groups primarily as a support in long fights and bursting mobs in solo play. And with this build you will be more sought after in general its a very baseline kind of build the Rank 3 Priest C1 and rank 7 PD C1 are interchangeable with other classes at that level but this is a standard for a reason as its pretty much always good due to skill combos.
This leads into priest vs diev:
Priest C1 makes you a support character with Res, Blessing, Monstrance, Aspersion best with Res 5, Blessing 4, Monstrance 1, Aspersion 5 with the build above. Res makes you viable in ET, Blessing is always good same with Aspersion but Monstrance gives you 30% dex in a dex build its terribly powerful for a 1 point skill.
Monk
Cleric C2 > Priest C2 > Monk C3 > Inq C1 i don’t know much about monk personally as i have never rolled one but base on what i know this build should be good in PvP and PvE you will have all the support you need plus some Priest C2 will make you quite good in PvP C3 is better but then you lose out big for healing in PvE without Cleric C2 your choice of course. Just keep in mind monk is a constant dps class very unlike pally which is all “burst” its a very active class to play and if you have bad latency is highly recommended against playing.
Cleric C2 > Priest C2 > Monk C1 > Oracle C1 > Kabbalist C1 > Inq C1 very cool build rare build seems very viable wouldn’t be my first pick but would have some very cool abilities with Oracle and Kabbalist would probably be very fun to play.
I would say this is by far the best monk build of the three and it includes all the classes you want to go!!! Cleric C2 > Diev C1 > Pally C3 > Monk C1 > Inq C1 whats amazing about this build is that you get the secret skill combo of conviction and god smash making god smash from Inq deal double damage from Pally C3 skill conviction. Pally dps is also very similar to Inq dps they work perfectly together their only short coming is that there is holes in your dps rotations that’s where Monk comes in filling those gaps. The risk here however is that one day those dps gaps may disappear with future ranks of inq making Monk a poor pick. Cleric C2 gives you all the support you need. Diev regens mana and reduces cool downs for the whole group but totems don’t stack however free TP’s are quite nice to have. All around just a great build and probably fairly fun.
Diev
Diev makes you a support dpser/survivalist you can regen mana and reduce cool downs as well as having a free teleport. Lifes good as a diev however many many players pick diev and sadly they don’t play well together as their statues buffs don’t stack so those skill become more or less useless. Diev 3 is amazing but generally speaking don’t get diev 2 unless your planning on Diev 3 as rank 3 has one of the best skills in the game which gives your group temporary invulnerability.