Originally Posted by Faith
Q: Good for trading/poke (Q+auto) if you have support with hard cc or shield except vs graves or caitlyn.
W: Really nice bonus in aspd, especially when you hit marked unit. Very strong for trading. Combine with something like a phage or BT and good things happen.
E: Very situational skill, but great for setting up ganks and chasing (bypassing minions as well). Slow debuff, but not much usage outside of it. Best used as a tool for setting up ganks, or after you mark with Q, E, then proc with w and trade (strong poke).
R: Strong burst and chasing ability, with some minor downsides. Best used to initiate on half hp champ or as finisher. To initiate just use like 2s before, blow skillset and swap back to normal then proceed to chase. Don't recommend to use as initiate tool on full hp champ unless you have taric, janna, thresh, or sona as support. Also great disengage tool and escaping ganks.
Q: Wat. Quinn is the only champ that can trade well with a hard CC support now?
W: "especially when you hit a marked unit"? You HAVE to hit a marked unit to get the bonus attack speed. Combined with BT you say? No shit, she's an ADC. Phage is a bad item for ADCs that don't benefit from Triforce/Iceborn much, Quinn doesn't spam skills for Sheen procs like Ezreal or Corki so those items aren't good for her.
E: NO NO NO, ADCs SHOULD NOT be the one to initiate a gank with a gap closer, the only time this would be a good idea is when the enemy laners are almost dead or if you're ahead (but even if you're ahead it's risky) but in that case why would you need a gank anyway? I don't even want to say it's good for following up ganks since it puts you out of range which is the complete opposite of what you need during a gank.
R: Burst? What. Valor form is all about small, fast attacks over time. Quinn is the one with burst with her passive and E proc combo. I already mentioned the disengage part.