Pantheon advice is requested

Pantheon is free right now so I tried him. I like him. I bought him. Now, I've poked around and figured out that the most optimal items to get on this guy are and apparently (although I still think this is overrated, and I'd prefer ) Now, here's a twist - I'm going to probably use him more jungle than top lane, and people who see my posts know I try to do off-meta junglers or just obscure "jungler potential" picks. This guy is on my "to-do list" solely due to the fact his kit makes it SO MUCH FUN to jungle with, and he's still strong enough to hold his own.

His W is like "BOO HERE'S PANTHEON, IT'S CLOBBERIN' TIME" followed by his E, and his Q to chunk the guy as he runs (unless it's , then I just commit sudoku).

Here was a build I was trying to complete (rune stats - +15 physical damage, +27 MR @ 18, +7 Armor) (Masteries - 0/12/18 - Strength of the Ages Keystone) (I don't think this order is optimal but the items there are what I was looking into). Poking around more people tend to play this guy like and just one-shot the opponent with the combo. However I wanted to be able to have more health and MR to sustain.

It makes sense that a jungler needs to be able to last in a team fight, although, really, I don't know how to gauge how good he is just yet in team fights, since he has one "AOE" (cone), and two single target abilities, and his passive really only works in 1v1's. Maybe 2v2's, but not full fledged team fights. Opinion me.