Yup… They changed the scaling of Blessing and Sacrament like 3 times @_@
There are INT Inquisitors, but not with your build. Some people go Inquisitor-Miko-Taoist for the big wheel splashes, with some other INT classes. In an INT build basically Inquisitor is filler that is taken only for its combo/synergy with the other classes you have.
A PalInquisitor will focus on the Paladin and Inquisitor, and since both are physical putting INT wouldn’t help you.
Without Cleric 2 but with Priest 3, you’re here to buff, use Revive, Mass Heal if things get dirty, and Resurrect if needed. So you wouldn’t be the main healer, but you’d be the anti-deaths support.
That will depend on your weapon. The way IMC made things, the more you work on your weapon, the more your damages will be based on the weapon and not your stats. And since weapon gets much more damages than stats thanks to enhancements, gems and transcendence, it is possible to not put any INT/STR stats and still have OP damages. But it requires a weapon that has a high enhancement and is transcended to stage 10.
If you have a potion to reset stat (or if you count on using one from a next event/reset event), you could also go STR for now so you’ll have good damages while you work on your weapon, and later you reset to go to full SPR.