Pantheon is a champion who abuses his strength to do a lot of damage in a short time and take down his rivals, perfect for one-on-one matches and to focus on priority objectives within group fights. With a great initiation, he can reach his opponents with Shield Jump, shielding himself with Protective Assault from the first wave of defensive damage, and finishing off with Comet Lance. Depending on the fight, we must take care of time to be able to use the enhanced version of the attack we want, being a good option Protective Assault. During the first few minutes, try to annoy the opponent as much as possible with Comet Lance, taking advantage of the basic attacks to activate Deadly Will and deal more damage.
Once you have Shield Jump, take advantage of Comet Spear's stun and slow to deal even more damage until you can finish off your opponent. Actions like these will force the rival to spend the Flash, being the moment to ask your jungle for help to finish the job. If, on the other hand, the opponent plays a more defensive style under tower, you just have to use Protective Assault to inflict damage and not take hits from the turret, as in the old days of the champion. Similarly, use Protective Assault to escape if necessary, as a retreat in time is better than killing the enemy.
Items like the Black Cleaver or Youmuu's Ghost Edge will help you further enhance Pantheon's strongholds. Pair it with a Guardian Angel to increase your survivability in group fights and be even more annoying for the rival. As the game progresses, take advantage of Pantheon's mobility to go after priority targets, trying to stun them and knock them out before they get too annoying.