I can provide you with data since i ss some matches to check dmg and compare stuff, but most of them are 24 man match since is where i can really compare something unlike 72 maches where stuff is so random(you can see a smn doing 500k and other doing 30k, or a monk doing 200k or one doing 25k).

In my opinion if you want to make something like a data 24 man matches are better since i think ppl take it more serious than a 72 (where alot of ppl just sit and wait to get carried by the others), since is only party vs party vs party and where skill matters more.