Instead of Greater Glyphs of force, I suggest that any readers use Greater Glyphs of Potency (which do not appear in the selection of making these guides) which give 1.2 ability power straight to grant the early dominance of 30+ starting AP.

The build eventually ends the user at about 2900~ health and 700 AP due to the RoA unique effect. The armor and active of Zhonya's Hourglass grants great survivability in team fights while still giving much needed ability power, while Deathfire Grasp is a great initiating blow and deterrent to any who might oppose the mighty Machine Herald. Please keep in mind that the build here assumes that the user is competent and resourceful in the use of items and summoner spells.

Assuming you went mid (and Viktor most certainly should), your main focus should be poking with your Death Ray early on until a Flash/Ignite burst is a viable option (usually when your opponent is at about 1/3 health). Upon said flash, immediately plant your Death Ray starting on them and going the direction they will run, follow with Power Transfer and Ignite to get the kill quickly and efficiently to get the early kills.

Just as i told you how to get the burst kill with Vik, the escape is usually left unsaid. Try to always keep at least enough mana for a Gravity field. The best case scenario is to place it in such a way that they must pass through it to reach you AND your escape route, E.G. touching a corner of a wall or turn in the jungle, and apply Flash generously.

Well, this is all I have for you summoner, so good luck and have fun upon the fields of battle.