Spending AP

[MarkVM]

Hey everyone, I'm new to this game and I was wondering what the best way is to spend AP. I usually buy upgrades with them but I recently found out you can buy food for your pets, is it worth it? I leveled it up once and it got +2 damage... Should I save up AP for something big that might be coming later or do I just spend it whenever I earn it on things like food and upgrades?

[Cheetah]

Auto Speed to level 10
Normal Speed to level 10

Those are your first AP investments. Do not use on pet food until you get your second ascension. (Buy pet feed increase then reset points)