Spells, the classes and which does it use?!

[BigBear5474]

Say you do a cleric of Light. Is the spells like burning hands, fireball etc, still based off int for to hit or is it programmed to switch to wisdom for those classes? Such as, If you do a High elf cleric that took say Fire bolt as it's racial (ie shadowheart), does that change the cantrip from int to hit to wis to hit, or does it stay int no matter the class?

One of the reasons I ask this is that Shadowheart is a trickery cleric with a cantrip of fire bolt due to racial(i assume). Her to hit on the intro ship against the big baddie is typically 40% with her radiant flame cantrip or other cleric spells. However, that fire bolt comes in at a 25% chance to hit that same target. Which makes me assume that it is intelligence based even though it's a cleric casting the spell. But when it comes to subclass given spells, do they also stay in it's natural to hit stat or change to that class?

This is kind of important to know as if that's the case, a Light Cleric will also want points into Intelligence for their offensive fire based spells that is typically a wizard/sorc spell.

[Landomart]

Light cleric uses WIS for their spell casting ability. Shadowheart uses INT for firebolt, because it's a racial ability.

[Morgian]

I got a second version of the same cantrip later, where the game told me I have now access to both versions. I assume one of them is the WIS based cleric version.