Very decent guide, I am surprised it is that low rated. Lets change that: +1

first of all, your build is quite nice, but i have 2 questions,
why build a infinity edge and why dont you build a tear before you grab your black cleaver so your manamune is stacked faster?

you didnt stack black cleavers

First of all: thanks for the feedback, guys! It's highly appreciated and if I don't incorporate it, I'll explain why.

@SpRuCePuPpY16
I've taken on-board the advice about Veteran's Scars , but I'll have to disagree with you concerning maxing Spear Shot initially. I'll start by saying that there are some situations in which I max Q first, mostly when I'm countered or just having a hard time sustaining my lane. However, if me and the enemy are evenly matched or I counter them, I find that maxing Heartseeker Strike first gives me much more damage output as my enemy can't do much about me going in on them with Aegis of Zeonia. Maxing Q first also means that my mid-game suffers, as Pantheon's E suffers massively without levels and if I max Q first, I find that it's all I'm able to use to do significant damage until after champion level 13. You're also forced to spam Spear Shot if you max it first in order to keep your damage output consistent, which causes Pantheon's infamous mana issues. All in all, though a first-maxed Q may seem like the obvious choice during the laning phase (and is if it's a hard lane), maxing E initially frequently gives me the extra force I need to actually secure kills rather than just deal damage over time.

@DJ Potato Bread
I don't roll Frozen Mallet because it doesn't work as well with this build as it does with most Pantheon builds. This build focuses on offence more than many of the somewhat tankier builds that you see, meaning that taking Bloodthirster instead gives me more than enough damage to begin dominating the mid-game, which is where Pantheon excels. I've put FM in as an alternative item, though, for those Panth players who just prefer tankiness to damage.

I love the build, i love playing pantheon, enough said. IF i were to nit-pick, i would ABSOLUTELY RECOMMEND Frozen Mallet, the added effect makes chasing hulluva lot easier, and if this really is a solo top guide, the added health is absolutely necessary. Also with the masteries, i normally use a 9/21/0 skill tree if solo top. I like the addition to Manamune, i don't see that in most builds, but it is handy with AD casters such as Mantheon. I like how his ult is 'imfamous' in the lol community. The counter section is very extensive and well thought out. Overall great build +1

This guide IS GOOD but while some ideas were great, others werent. Im very experienced with pantheon and some of the mastry choice like -5% turret damage over 30 bonus health? not needed since aegis protection is all you need for turret dives, and I do WAYYYYYYYY more damage maxing spearshot first since it has a low cd and does more damage than heartseeker strike during laning phase, if you play pantheon PROPERLY this does alot morfe damag. Kill sequence should be Q->2-3 times for harass, then Q into W->Aa->E->Aa->Q->W to stun/ gap close->Aa->Q and by now they should be dead, but if not, then you can drop their turret with R and W(aegis protection blocks a turret shot) then Aa->Q/ignite Aa= Autoattack. :)