Pantheon Guide

Tips for Playing Against Pantheon

-Be careful of his Q. It has a shorter cooldown when he taps it instead of charging it, and also does extra damage if you're under 20% HP. I'd play safe early.
-Don't get in a gankable position, as his stun can interrupt your W, so that you can't escape.
-His ult allows him to get back very quickly, so be ready to recall and teleport instead of pushing in, if needed.
-You can ult him while he's waving his shield at you, and if you hold him there he won't have his movespeed when he comes out.
-His stun does percent max HP damage, so be careful of that too.

Doran's Ring

Doran's Shield and Doran's Ring are both fine depending on how you wanna play the lane I think. Shield allows you to take more poke, and Ring allows you to sit far enough back and just Q minions without running out of mana, thus taking less poke. I think I lean ring, but I haven't tested it enough. Maybe a good Panth can mess up ring, I'm not sure.
Heartsteel

Heartsteel is nice, as Pantheon isn't super beefy, the range is nice, and is just overall a great item.
Iceborn Gauntlet

Iceborn and Dead Man's seem nice, as they would assist in chasing him down at times that you spike against him.