18
Score awarded when a fighter meets at least two of the three criteria of impact, damage and dominance, as well as duration, reflecting significant dominance without the referee having been able to stop the fight.
Explained in Jab Life

Our ideas to REVOLUTIONIZE MMA scoring - Jab Culture #2
« we remind you that for an 18, there are three criteria to be able to give an 18 which are impact, damage, dominance and duration. If you have two out of three, normally you can already very strongly consider giving an 18. »
Alex · at 31:44

Lopes extinguished Silva, cold water on the Nerds + Jousset-Abdoul cancelled
Round score given to the loser when the winner has clearly dominated the round. Under the new ABC rules, a 10-8 score is mandatory if a fighter accumulates damage and at least one of the other two criteria: domination or time.
« before you needed all 3 D's - damage, domination, duration - to be sure to give a 10-8. If you only had two, regardless of which two, it was up to the judge's discretion. Now, if you have two of the criteria including damage, it's mandatory, it's a 10-8. »
Aldric · at 1:16:25