I don't own a knee or hand ascender anymore, someone liked it more than me I guess. I've got a notch jet step and I love it.
Most of my climbing is on spurs and flipline, when I'm playing with SRT, it's deadwooding smaller pines. My method is throwline-swear-word-game, choke climbline off as high and solid as possible, pick a foot and add the jetstep, one leg squats my weight up, the other spaces me from the trunk. It's not elegant, but it's for my applications, it's actually very efficient. Obviously I switch the leg doing the work to spread fatigue. Sometimes, when I'm on the umpteenth trip up for the day, I'll set my dan house rope saver, clip the Unicender for DRT and use the slight mechanical advantage to ease up some. But to be fair I don't climb much, except rec stuff right now, life circumstances and all...
Always take my input with a bit of salt, my kit and my methodologies are tailored to where and what I climb, as is true for most. However, the variety of species in my local area is fairly slim, it being the largest contiguous stand of Ponderosa in the world. This affects the gear I have, and what I most commonly use, as well as how I use it.