Been Spamming Pantheon: Hydra Combo with Pantheon (Tricks I've learned to 100 To Zero faster)
I've been Spamming
in a lot of my games recently and I find it very cool that he is played like an assassin now. Against people who will respect your early game strengths, you will fall of quite fast due the lethality build. The key to not falling off is using your lead efficiently (Smart. I know)
Pantheon's passive (Mortal will) is the key to his success. The most optimal 100 to zero combo with 40% cdr is 5 stacks of Mortal will > W + Tap Q (the q will cancel the basic attack after the W) > auto to get 3 stacks, auto again, and then tap Q if you're near minions. If under tower, save E for the turret. Why you W first with 5 stacks is because it will give you 3 stacks of your passive back from your next auto attack.
and
: After a lot of experimenting with his kit (especially his passive) I think that tiamat rush is incredibly nice because you're able to slot it in between W >Q and will proc the Tiamat passive 3 times with his W. It's more damage and is great for pushing in the wave, as his mana pool is pretty low if you're constantly harassing your lane opponent. You can also use Tiamat while you're stuck in the E animation for a bit of extra damage if needed)
Why you would want to build
is because titanic hydra will give you some sustain, applies the on-hit effect with your W, and will give you an basic-attack reset. This basic-attack reset is key.
With 5 stacks of your passive, you would do the all in combo: 5 stacks of Mortal will > W + Q, but this time you can Basic Attack > and then immediately Titanic for the 5th stack, and then finish with tap or hold of the Q (depending on how open space it is). This is extremely useless late game as Pantheon will have enough attack speed to get 5 stacks by the time Q is back up.
Items that are a must buy would be

I'm not saying you will make it to challenger with what I've discovered (although you totally could :) ), but I just wanted to share some of my Pantheon tricks.
Give it a try and tell me what you think of it.