Viktor vs Jayce

Poke with Hextech Ray (E), fired in the direction you choose: it hits every enemy in its line, and its upgrade adds an aftershock in its wake.

After Siphon Power (Q), land an auto within 4 seconds: it deals bonus magic damage, and the spell's shield covers you during the trade.

Place Gravity Field (W) in your target's path, then fire Hextech Ray (E): the field slows them, and if they stay in it for 1.25 seconds, they're stunned.

Glorious Evolution (passive) upgrades a spell every 100 Hex Fragments: Hextech Ray (E) to poke and clear, Siphon Power (Q) to survive, Gravity Field (W) to slow.

Place Arcane Storm (R) on grouped enemies: it follows the champions it just damaged on its own, and you can recast it to move it.

When he places Acceleration Gate (E), expect Shock Blast (Q) through it: the orb gains speed, range and damage.

If you have range, back off when he switches to hammer: Mercury Hammer (R) makes him tankier, and he can't go back to cannon for 6 seconds.

Engage after Thundering Blow (E): it's his only knockback, and it has a 20 to 10 second cooldown.

If you survive the laning phase, play for time: Jayce is strongest early, when his cannon range dominates the lane.