Hey everyone this is my first guide I don't really know what I am doing but ima give it a shot. This guide is for a straight burst Viktor.

I max death ray first because once you get your death ray augment it turns out to be very strong and when not fighting champions clears creeps waves very easily.

Power transfer comes next, i find that if i max this first i am at a disadvantage because if i get close enough to cast it another player has already hit me before i get my shield. however it becomes quite powerful late game.

gravity field i only put point and max last, nothing improves dramatically enough to make it viable for upgrading.

Chaos storm, this ult is stupidly stong when combined with your gravity field, essentially it does aoe damage every second, starts of as pretty low damage but late game can go up to about 200 damage per second, oh yea and you can move it to follow champions, the only thing is the further away you are from it the slower it moves, also its got quite a cooldown so use it sparingly.

Pros
really strong mid and late game
can cc multiple people at once, people fear your gravity field
power transfer can be a life saver
incredibly powerful, moveable, aoe ult

cons
death ray casting arrow is a bit deceiving
gravity field can be kind of complicated to cast as it has to deploy before effects are applied

I like to get Morellos tome first because that allows me to spam the **** out of my death ray. right after that i get my augment to make my death ray to extra damage over time. some people say get the power transfer augment but i don't think its that great because you have to wait for your disc to actually come back to you before you get a speed boost. once you have that go for rabadons and void staff. usually the game will be over by the time i am halfway through building voidstaff. i put lich bane on here because i figured by the end of the game i have nearly 600+ AP and that would be a stupidly large hit. Ive never really had time to build it though so just something to think about.

Hope this guide helps, like a said i don't really know what im doing but this build works for me most of the time. Im sorry mines not all flashy and colorful like some of the top voted guides but if there's anything i can improve on let me know please!http://www.mobafire.com/league-of-legends/edit-build?edit=166316#