My idea :

Keeping the summon like this, and for the one that want to get stronger NPC : Adding other spell to their template that will boost their summon like : rank 15 : When summoning, the summoned creature get +15 to each stat


Or something like this, it's just a global idea.

Here is what it is at, what a summon doesn't have a profile, it will follow my scale.
When it does, it will have its own points and the summoning spell will boost its power equal to the rank of the summoning spell or.. it can get a boost from my other chart.

I really can't decide on either/or.