No, but it’s more efficient to just go one. You need the CON for survivability no matter what.
CON is also very important if you want to PvP.
Chaplain uses very little mana, so you don’t need SPR anyway if you went INT.
I thought we addressed the fact that SPR isn’t for the SP already? Chaplains may use very little mana, but priests have a multitude of skills that only scale with SPR.
Not saying INT isn’t valuable. You’ll get more damage out of INT for sure. But the reason to get more SPR is to be a better supportive character, not to cope with SP issues.
Dont forget that Heal and Mass Heal scales better with INT because og the 10% rank bonus
Chaplain can sustain a high DPS in end game world bosses?
Well, this is the dmg of 280 chaplain full Int:
Ignore when he atks as druid if you don’t take that class
Thats a pretty high melee dps build indeed, and maybe the best one for a melee cleric, but you think you can be under the top 6 dps on end game world bosses with a Chaplain?? Sadly the end game boss rush requires alot of DPS, and a melee dps Clerics will be always behind a ranged caster Cleric based on my researches. 
Thanks!!!
If you really going for best Cleric damage you can’t just go melee.
In chaplain for example you would have to add some of PD, Druid, Krivis.
Something like this guy in the video tried to do.
It’s totally possible to ramp up your damage due to melee attacks of chaplain scale with Int.
I would probably go c1/p3/chap/kris/pd or d2