Here are the current layouts of Punch Club's skill trees. You can use their layout to help plan out your fighter's build.

Basic Skills – Balanced Tactic. All fighters start here.
PunchClub BasicSkills
Way of the Bear – Slugger. Strength-based builds.
PunchClub WayOfTheBear
Way of the Tiger – Fast-Paced. Agility-based builds.
PunchClub WayOfTheTiger
Way of the Turtle – Meat Shield. Stamina-based builds.
PunchClub WayOfTheTurtle