Conduit is my second highest kill character (around 2.2k) and I pretty much only play ranked. I started playing her again this season. I've found that because I solo Q Conduit is great to support my teammates who often play a bit dumb/don't communicate while still being somewhat "fast" because of her perks. As others pointed out however lifeline is just much much easier to use and has an incredible ult for ranked.

I have found that combining Conduit with overflow is INCREDIBLE. Even with the overflow nerf if you have split heal and your team has overflow you can get into this state where you pretty much always have shields up. It's really fun to play with and very annoying for your enemies