Okay you are currently looking at being a lot over your current limit.

Please note 17 metres is a lot larger than the original 9 feet, and you are only level two at the moment. Could I ask you to bring this down? This will allow me to fit it into the PL.

Alsong able to summon prevalida swords is the maximum that you will be able to go, and since it does not state he cannot summon more than once that is using some PL.

To work this out I suggest bringing down the height of the summon, as well as reducing the strength advantage. If you add a single summon at a time weapon provision as well as possibly restricting it to a number of posts then that will work.