i think my pet has the highest level. but LOL if you think i boosted level (i) alone at all (ii) for the sake of ranks.
My level being high is a side effect of certain boosters (tome, goblets, laurels, etc) being cheap. If i could, i would withdraw all my pets from being ranked, i don't see why rank matters that much to some people.
side note, Training by tiers means you can solely train a specific stat (health) without the consequence of rapidly increasing training times. no support.