Okay let's try this approach
When i'm top lane, how best to deal with a Pantheon, here's my 4 champions, Garen, I know auto than q than e back off that's how I beat him is by winning trades, till I get him low enough then ult. Now Jax, how do I really deal with him, do I not engage him, hug turret, what playstyle should I play versus him? Trundle what can I do against him with Trundle? As well as Gangplank any help on this subject would be good, and please none of that play other champions I play 8 and have master their kits and now am just trying to learn to improve, fact is I like my pool I use and even if that was an option of simply pick another champion what happens if I already picked a Gangplank, than they pick Pantheon what do I do then? Please no trolls and no comments saying you just die, legitimate help would be nice tired of being shit on and having no impact in a game when facing a Pantheon.