Hello Summoners! This is my first guide ever on MobaFire! I hope you'll like it... :D
To introduce myself, I am silver 1, recently hopped to silver from bronze 5 but unable to get to gold :/
This build I made when my friend told me: 'You should get manamune in jungle'! And I was like: 'Okay, manamune, huh..' Then I wrecked the whole game by adding some items and after little testings I've seen enough to say that this build works awesome if in right hands (lmao silver 1 talks)

Pros:

- Naturally good jungler because of passive
- Really strong early game ganks
- Really strong early game champion
- Can deal alot of damage if mastered
- Easy last hitting

Cons:

- Doesnt deal much damage if not played properly
- Weak lategame
- His ulti must be used well to use his full potential, which is hella hard

Marks - AD runes over penetration since you're jungler, you dont need penetration (just cause monsters doesnt have huge armor)
Seals - Armor since monsters deal physical dmg
Glyphs - Scaling mr since you dont need flat mr in jungle just because monsters deals no ap damage, but you will need mr later on aganist champions
1x2xQuints - Lifesteal for some little sustain and movement for better gank potential

21/9
Look up at masteries sequence.

Aegis Protection

Passive: After attacking or casting spells 4 times, Pantheon will block the next incoming basic attack or turret attack.

This passive is what makes your jungle easy, you have to use 4 spells or aa-s to get a shield that will block next autoattack. Since all of the monsters are working on aa this passive really keeps u durable in jungle aganist bigger monsters!

Spear Shot

Active: Pantheon hurls his spear at an opponent, dealing 65/105/145/185/225 (+140% bonus Attack Damage) physical damage.

This is your main damage source. It adds 140% of your bonus ad!? Wow! It has pretty low cd so you can start a gank with this spell then follow up with your W so if enemy flashes away you will have another spear thats ready to make a kill!

Aegis of Zeonia

Active: Pantheon leaps at the target enemy champion and deals 50/75/100/125/150 (+100% Ability Power) magic damage and stuns them for 1 second. Pantheon also instantly refreshes his Aegis Protection.

This is what makes your early ganks good! A stun! This spell is used to freeze your enemy in a place. You can use it to engage a teamfight also since of its refresh of Aegis Protection..

Heartseeker Strike

Passive: Pantheon's basic attacks and Spear Shot gain 100% critical strike chance against targets below 15% health.

Active: Pantheon focuses and deals 3 swift strikes in front of him for 13/23/33/43/53 (+60% bonus Attack Damage) physical damage per strike. Deals double damage to champions.

This spell I use in jungle just to stack my Tear of Goddes/Manamune ready for Muramana. Deals good damage to champions only. Good thing here is passive, that can secure that your target doesnt leave with 10hp or so, even your spear can critically strike!

Grand Skyfall

Pantheon gathers his strength and then leaps high into the air, crashing down at the target area a few seconds later. Deals up to 400/700/1000 (+100% Ability Power) magic damage to units at the center (down to 50% at the edge) and slows their Movement Speed by 35% for 1 second.

This ultimate is amazing if used well! You can use it behind your targets to zone them, or to jump into a middle of teamfight and deal tons of damage in the big area! Its just amazing if used well! Try not to throw it away!