This only holds true IF you MVP. Which will require manualing with extreme power levels. Something that isn't accessible for like, 98% of the playerbase.
Therefore, it's much better to just fight Guardians or Rag Disaster. ~20% chance to get Page? Check. ~50% chance to get Treasure/Magna? Check. Much easier to MVP/Vice? Probably still impossible for like 80% of the playerbase, but check.
Just forget about Och until Purple Chests update. Fight easier fights with better loot. Currently I still see that Ochs just fill up extremely fast, but people are going to realize that there are better options.