User blog comment:ArbyMcSwagger/(Minor Passive Rework) Twitch, the Plague Rat/@comment-24420226-20150312000100

In comparison to other marskman, Twitch's identity mechanically revolves around him roaming the map on his own (or with a small back-up squad) and making picks. He was the quintessential Assassin ADC. Then they gave Tristana an AD ratio. :/

The trick with this is that, for maximum effectiveness, Twitch wants to fight and kill his target within a 5~6 second window (about enough time to get full Venom stacks, expunge, and a few extra autos); a shorter fight is usually a result of his opponent having more burst and overtaking the duel, and other ADC's begin to catch up to him in terms of damage output after this time window.

What might be nice is if his venom had a 'shock' factor so that stacks hurt more when first applied (or while the ambush buff was active), but then lost power over time. This would help reduce the 'duelling window' Twitch needs to properly pull off his assassinations and make him feel slightly burstier for both him and his victims.