Drop ritual casting, arcana then buff binding(you are a summoner so its core skill), perception.
Make Cha 6 and WIL 5, change LOG and INT, put one point from STR to REA for more combat optimization.
You need one lethal spell: Ball lighting/lighting bolt or Fireball are good for aztek, but i prefer ice spear/storm for that nice chilly feeling.
For "merits" you should check spirit whisperer/spirit champion/Spirit affinity
I would put both skill group points into athletics, 3 dices for sneaking is useless because typical police officer has 10-14 dices for perception checks.
"Hard" manipulation spell like Control actions etc are quite useful.
For mentor spirits:
Raven is most cost efficient for any Cha based awakened character, but for me does not feel "right" for an Aztec mage.
edit: Well i checked my grimor.. Aztec mythology book and it mention about priests shapeshifting into ravens, so getting shapechange spell is quite good idea.