A little bit of a spoiler in my comic, but my protags are on the brink of death no matter what (constantly on the chopping block). This is just for Season 1, but Season 2 is going to be radically different what with me constantly introducing Isekaiers... and even then power barely means anything since Quincy confirms that they're in one out of an infinite amount of journals.
Strength - I guess that would be Tizoc's Aztec spirit and him being able to crush stone.
Speed - Would most likely have to be John since he has fast reflexes (trained his stick figure body to be perfection).
Durability - OOOF... uhhhhhh.... Quincy survived his fall. Dude fell like 20 feet and hit the principal in the head. Although he TOTALLY would've been dead if it wasn't for Nikado keeping him alive. Although, he totally did so because he changed his mind last second. He PROBABLY would've let Quincy die of a coma.
Attack Potency - I don't think I have an answer for this lmao. I guess Tizoc's spirit but even then it was defeated in the most pathetic way possible.
The stick figures in the stick figure world are just as fragile as us in the real world... it's really pathetic, but it's supposed to teach the isekaiers how to be humble and how despite being potentially labeled as "protagonists" in their worlds, they're not exactly the center of everything.