The best way to do this if you're not really sure what you're doing is:
Req.
Dummy: +0
Prefered Rune: +6
Question: Why the prefered rune must +6 ? not + 7 or higher?
Answer: Because this is the Rune's level that start to -1 or degrade, and besides it's so easy to upgrade your rune into +6.
Now you already do the animation skip.
1.Now upgrade the Dummy rune.
2.While the rune is starting to glow, do the animation skip and change the dummy to your prefered rune.
Your prefered rune is now +7 and dummy rune is still 0
Just put into your mind that your dummy rune is already +1 instead of zero.
3.Do the step 1&2 4 times().
Note: As you do the steps 1&2 the dummy rune is still zero in your screen, just always put into your mind that as you repeat the steps 1&2 your also adding + 1 to the dummy rune
Now your prefered rune is now +10.
4.Upgrade your dummy rune until it goes back to zero(or if your too lazy to do it, just use another rune with 0 upgrade) and back to step 1, until your prefered rune will become +40 or whatever ups you like.
If you do the process for
1 time your rune will become +10
2 times = +14
3 times = +18
4 times = +22
5 times = +26
6 times = +30
7 times = +34
8 times = +38
9 times = +42
10 times = +46
etc.