This path is a popular solo Bokor Doctor2. I don’t think you will need pardoner if you don’t solo a lot - mobs die quickly during teamplay. So take bokor3 first, and decide on r6 class later (you might get a guild, team, etc.).
Remember your Cure scroll will only be level 5 (because Simony will be level 5) so at most it will be a really weak Cure, with a very expensive cost as well.
I don’t know if you already have a pardoner, but with mine, I have this bug where I can’t craft more than one dispeller scroll at once. I need to manually craft them one by one, which makes the skill extremely annoying to use.
Also, buying them off the market isn’t much more expensive than crafting them your own.
There are very, very few pve places where status resistance is actually important enough to make you consider turning on that dispeller and wasting money to resist it (yes, main chamber is one of those few places).
Indulgetia’s damage is terrible, I haven’t bothered getting a full oblation boost to see how much damage it dealt, but I really doubt it will be anywhere near useful as a DPS skill.
Sadly, I would recommend you take pardoner only if you intend to sell priest buffs or sell skill scrolls. One rank in pardoner isn’t worth it just for extending Incineration’s debuff time.
Discerning evil increases Incineration time, yes.
With divine might + simony5, you will get lvl 6 cure scrolls.
Indulgentia isn’t used to damage, it is used to lure a lot of mobs, and to cure debuffs on your team and your zombies.