Baldur's Gate 3

Keep in mind this is theoretical, so assumes perfect setup + max damage rolls

Hasted sorcerer attacking a grouping of five enemies

• action 1: throw a bottle of water at them

• action 2: twinned spell Chain Lightning

• initial targets hit once, doubled for wet (80x2=160)

• each enemy aside from the initial two targets is hit twice, doubled for wet (80x2x3=480)

• (very) theoretical max damage of 640 for one spell slot and 6 sorc points

Meta it is not, due to the very specific use-case and the setup required, but it's a great opener or closer, and I pretty commonly hit +200/250dmg using this. Cleared every single ad in the >!Orin!< fight in one shot this way lol

Another fun build I just tried out in my friend's game

Paladin/tempest cleric

Moving parts are as follows

• Thunderous Smite (spell slot)

• utilize Destructive Wrath to ensure max damage roll on the thunder damage (channel divinity - short rest)

• use Luck Of The Far Realms to ensure crit (long rest)

• use Divine Smite on Crit for more booku bux (spell slot)

Haven't played w this one too much, for stats you'll want to dump CHA tho, weird for a paladin build but the important bits of this build don't involve the actual spell effects for paladin so ¯\_(ツ)_/¯ in terms of efficacy though, at level 7 I did 120 damage in one attack lol.