Pantheon's mana starvation when jungling is a little... much...
Even with Ranger's Trailblazer, I find myself continuously out of mana unless I get a blue buff, something that isn't always available if the enemy is stealing. If this isn't intentional, Pantheon should get some sort of bonus to his Q when fighting monsters.
Something like... killing a monster (but not minions or Champions) with Spear Shot refunds the mana cost.
Too much power?