Viktor vs Vladimir

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.

Force him to use Sanguine Pool (W) early in the fight, when it costs him the most health: he can't become untargetable again for 28 to 16 seconds.

Back off after his first two Transfusion (Q) casts: the next one is empowered, hits harder and heals him based on his missing health.

Get ahead early: Vladimir mostly shines later, once he has his items, since Crimson Pact (passive) turns his ability power into health and his bonus health into ability power.

During Hemoplague (R), focus him if you can kill him before the blast, otherwise back off: you take increased damage until then, and the blast heals him per champion hit.

If you have Grievous Wounds, apply it to him: Transfusion (Q), Sanguine Pool (W) and Hemoplague (R) all heal him.