The formula you have insert is ok.
Now I have problem in the FORMULA column, it contain this formula "_.chain([{{Wappalyzer: CMS/Marketplace}}, {{PredictLeads: CMS/Platform}}, {{BuiltWith: CMS/Marketplace}}, {{PredictLeads: CMS/Platform}}, {{Clearbit: CMS/Marketplace}}]).compact().groupBy().orderBy(['length', 'value'], ['desc', 'asc']).head().value()[0] || ""
I need to analyze every field and obtain the most frequent CMS then (if the frequency is the same) win Wappalyzer -> PredictLeads -> Builtwith ... in order then if null in every field "null"