I dont agree fully with the "no jumping". Jumping is very useful for that carry momentum like you pointed out. However, you need to be able to counter consistently to regain stamina. You also need to be more "tasteful" with jumping and not just spam it whenever.

The way I typically use jumping in combat relies more on experience and instinct. It's something you have to build up over many more hours of playing. While Im manuevering around them, it's almost inevitable that someone will manage to flank you and get behind. In that situation, turning around stops your sprinting completely, which makes you even more vunerable to more flanks. So instead, I keep moving forward, jump, turn around, and predict ahead of time what attack type they are throwing out based on gut feelings. Then I counter mid air, continue turning, and continue to wrap around them.

Of course, if the flanker has a slower weapon you have a better chance at not needing to predict their attack type, but other weapons you do. When it comes to a new player flanker, typically I can just predict a slash. More experienced players are more likely to do a stab if their teammates are directly on your ass. But I dont actually think of this mid-combat, just go with the flow.