I'm trying to train a pet as fast as possible. Right now I'm doing cupcake training + swashbuckling academy until level 30ish, when I'm going to starting using the lab ray, which is likely to increase strength/agility over time but decrease defense (and go down to level 1 stops being an option around level 20 I think, but it can still decrease your level anytime and a buffer would be nice).

Are there any other viable strategies? I'm eyeing negg training but it's quite expensive.