I can comment you on support since i play one.
C1>Priest3>Chap1>Pardoner2 Is not enough to keep a party alive alone, it needs one more damage (high INT) healer in the group.
My build is: Cleric2>Priest3>Pardoner2 (lv256+). It is a support with good enough heals to hold a party up. And lots of defensive buffs/skills for every situation.
Beware tho, I am playing with a Krivis or else I would be breaking the max Buff count and that is NOT GOOD AT ALL. If you do not have a Krivis in the group you should be getting Diano scrolls, that aren’t cheap and have 6 mins duration each.
One of the best healing builds is: Cleric2>Priest3>(whatever you wish, optimal could be Chaplain to add some extra damage in the party)>PD - 1:1:2 Con:Spr:Int
Comment on Chaplain: Adds decent damage to the party, but at some point you won’t be meleeing mobs for your own safety and focusing on keeping party members alive. Its buffs are OK but not something big, it is more of a self sustain class. Deploy Capella makes your stone skin permanent but it needs the party to stick to the area where it is placed and it has a chance to get destroyed.
Comment on Pardoner: The Magic resist skill is REALLY good but only if you have 200+ SPR, if you do, it is possibly one of the best defense skills against mages. There are tons of mages late game and all hit like trucks, their dmg is cut by half with this buff. Also Pardoner3 is not so great, should never go for it.
Comment on Plague Doctor: One of the best, if not the best combos if you are going with Pardoner path. Discerning Evil + Pandemic makes wonders. Also adds some healing what a pardoner misses (still worse than going C2 cleric), and lots of cc protection what is needed in later levels. Bloodletting saves lives and it is a party buff.
Comment on C2 Cleric: Tons of healing, amazing safety wall (with the attributes), divine might is a great buff. You won’t regret taking it. C3 Cleric in other hand is an over kill atm, there are better options than going for rank 3.
In case you are going for C1>Priest3>Chap1>Pardoner2 , other valid and better options instead of Chaplain are C2 priest or PD. Chaplain works tho.
One more comment: If you plan to be partying with friends 24/7, once you be reaching lv225+ you will want a Krivis (minimum C2) and a PD in the group. That is the point where your party will have around 10+ buffs at a time and where mobs commonly use cc’s like sleep and freeze. Not being able to keep all the buffs up equals to losing tons of possible damage, defensive and utility skills.
I also do not suggest having a Class that is in the same time a Priest and a Krivis, unless it can go with Priest3 and Krivis3 (what isn’t so good), it will fall behind all the higher ranked Krivises/Priest, to the point that you would be saying, for an example: “Do not use your Krivis Buffs, the Krivis guy XXXX has better ones than you!”
I never felt a need for a Chrono, I partied with some tho. He got great utility but it is not a must at any point. Speeds your party up (what is nice) and gives some great buffs, but it is not a game changer if your party knows what they are doing (Low hp classes staying behind the tank, not over mobbing, healers healing, ect)