|Creature Level is an OOC metric, gathered using in-game measurement tools. Unlike rank ranges "creature level" is not anecdotal data, but it does not correspond directly to Player Character Levels or ranks needed to successfully hunt said creature. You can gauge one creature's difficulty against another using these scores.|
Rank ranges are provided by those players who have been kind enough to document their training experience. (Entries that lack rank data will show up as 2,000-0 ranks.) This data may be outdated, as recent combat changes have tightened the teaching ranges. Your mileage may vary depending on your stats, buffs, mastery skills, armor, and other factors.