To learn more about TIG fingers and other welding accessories, https://weldmongerstore.com/ There is a technique for tig welding called "walking the cup".
While its mostly useful for pipe welding, it can also be a good technique for long runs on fillet welds.
In this video, I talk about cup size, electrode stickout, and how to hold the torch.
I set the lincoln TIG 200 to 177 amps and pretty went full pedal for most of the welding and I used 1/8" er309L filler metal just due to the fact that I had plenty of it.