Hi! I appreciate your nice comments in regards to Script Factory!
To answer your question, you may absolutely do that! It is under Other->Variables->Switch to Script. It lets you quickly switch whatever script is running to another. There are also things you may take advantage of, such as global variables that remain even after switching scripts.
For more information on comparing skills you can choose between either dynamic compare or static compare. Just go to Other->Skills and you will see a method called #getSkillLevel. You'll have two options, one to get the static level, and the other to get the dynamic level.
If your strength level is 60/60 and you take a random pot that changes it to 68/60, the dynamic skill level is the numerator and the static skill level is the denominator.
Typically, when checking the level for prayer as an example, you would want to get the dynamic skill level. This way you will know when you are about to run out of prayer points.
I hope this helps!