Originally Posted by Maverick9835
Sacred flame is quite underpowered when compared to the other cantrips, that being said it does not need a massive buff to damage or some ridiculous modifier. It simply needs one of three changes to improve consistency:

1.) Change the saving throw from DEX to INT, WIS, or CHA. As these skills tend to be lower in npc opponents and would improve the odds of dealing damage.

No, the only appropriate other save for it to target might be Wisdom, and we already have ample spells that target that save already. There are also fewer ways to negate or disadvantage wisdom saves, as opposed to dex saves which have a variety of ways they can be forced to disadvantage or even negated entirely.

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2.) Add the spell modifier that enemies take half damage when succeeding a saving throw.

No, it's a cantrip. Cantrips are non-resource spends, and they are universally all-or-nothing, that's how they work, with the exception of one or two very specific class features in the mid to high levels.

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3.) Last but not least (and my personal favourite) simply make it an attack cantrip so it rolls against AC and not abilities.

No for gods-sakes no. MOST of our cantrips are attack-roll based, and we have a glut of them already.

Sacred flame is mostly fine as it is. What it needs is something to replace the rider effect that has been removed due to not being implemented in game. They could very easily make it target "a creature you are aware of within range", and thus remove the need for line of sight to target as a way of partially re-creating its cover-ignoring rider in a game where cover does not exist.

As mentioned before, one effect of it targeting dex saves, especially in Larian's game is that there are many ways that you can make damage from sacred flame Completely Guaranteed. If a target is knocked prone, in BG3, they are also treated as unconscious, which means they automatically fail dex saves. A prone target also gives disadvantage to ranged attacks, so all of your attack roll cantrips suffer disadvantage if you wish to attack that prone target, while sacred flame becomes a guaranteed damage spell in the same circumstance.

Use it properly, and you'll have no trouble.