I began inquiring about it just recently and from what I've discovered, even for someone who considers most of his work long in length, even most of mine couldn't stack up to the length of so many others. Not even my longest battle yet could break the top 10: that's how long some of them are.
So this here's the (currently) 20 longest battles on this Wiki that I could find.
For clarity, all of these were from completed battles, and the word count did not include music cues.
Down the line, more may be added, but for now, these 20 are the longest fights you're gonna find on the Wiki by far.
Two of them featured Sailor Moon and Dante, Para and Ahomes are the only two writers on the entire list with more than one battle to their name, and Ahomes holds the record for the longest battle on the entire Wiki at 18,000+ words.
BIG’S EDIT: I have decided to highlight this thread to show everyone what the longest battles on the wiki are. Also, if Nk is ok with this, either me, him or the other Admins might edit this thread in the future and add in the future battles of users whose fights are long enough to be featured on this list. So, if you manage to complete a battle in the future that is long enough to be included on this list, please post a link to said battle along with the length of the fight down below so we can include it in said list. Thank you.