Although running uphill is a serious challenge, it still provides so many benefits. There are also many ways to approach the incline. If you want to keep your pace consistent rather than focusing on maintaining a steady RPE (rate of perceived exertion), focus on your arms. In some feat of evolution, our arms and legs are wired to keep the same pace. If you pump your elbows back at the rate you want your feet to go, your legs will follow.
For me, as my legs start to feel heavy, I put all my energy into my arms. I can’t say it makes me float uphill, but it does somehow lessen the burden maybe because my arms are closer to my brain?
Try it next time you're running uphill; it really does help.