I do max and augment Deathray first. And the Q speed boost is great on Viktor, since it ensures his next autoattack. Most players dont let you stand there and Q-Auto you. If they see the Q coming, they run away - its hard to get the auto off without the necessary upgrade unless you run movespeed quints and 21-0-9 masteries.
Now, why do i think Viktor is an early game champion? Base damages and ratios. WIth one upgraded Hex core on his E, he unlocks possibly the strongest, non-ult ability in the game - 500 +140% AP ratio. Thats HUGE - thats stronger than most champion's ults. However, he has relatively short range on his abilities aside from his E, he is immobile, he is squishy, and he has no real peel. Yes, his W can peel, but most assassins can kill him before getting stunned.
Now, for the reason why i dont get the W upgrade (and consequently, the ult upgrade) until later in the game - a stuns a stun. If an enemy is stunned within your W, does it matter if they move 200 units to the center? They are already stunned in a fairly small area. Also his gravity field has a 1.5 second delay on a 700 range ability. Ori ult is .75 with a 1225 leash range. Youre comparing two abilities, one which is practically twice as easy to hit - almost twice the range and hits twice as fast.
i think youre playing viktor wrong if you decide to get a perfect hex core as your first major purchase. I dont do it. The pros dont do it. I dont think you should do it. The main reason is damage. For 1000 gold to get the tier 3 upgrade, you get 20+1AP per level, along with 200 mana. Now, with a mana pool of 300 from 2 upgrades, you shouldnt need the extra 200 mana (especially if you start dorans). Lets say you fully upgrade your hex core at level 10 - a reasonable endeavor to gain 3000 gold. That means you get +30 AP at level 10 from your hex core. For less gold, you can get a Fiendish Codex for the same AP and 10% CDR. For less gold, you can get a Blasting Wand for +10 AP And for a little bit more gold, you can get a NLR. I agree - it improved his super lategame teamfighting. But it only improved after level 15 and after 3 upgrades. Look at some pros play viktor in solo queue.
- Bjergsen - 22 minutes, no third upgrade. Bought Ludens and Void staff though.
- Febivan - 35 minutes, upgraded 3x after Morello, Zhonyas, and Void.
- Fox - 40 miuntes, upgraded 3x after Morello, Deathcap, and Void
Most of these guys upgraded 2x immediately, or bought only a Morello (or parts of a morello) before getting 2 upgrades. However, they dont finish the full 3x upgardes until they get 2-3 AP items first. Now, unless youre telling me you know more about Viktor than some of the people who play him on the LCS stage, youre absolutely wrong about Viktor.