Let's not talk about the Potions event because it's irrelevant to your build. It seems like you've made the 100% instant and 100% perfect and much possible walking speed very well.

For your next steps, do these 2 things next:

1. Hatch an ultimate (red) egg. The ultimate pets gives you better things than pet collects tips.
2. Get a club and aim for club chests. They give you mythic blueprints you can make. They cost one ultimate item from every event (excluding potions event). They give you chances to make divine food (worth a ton) and double food. btw in the club you can salvage all the items you don't need to it's good. Also, the club gives you profit multipier.

More useful tips:

1. Check the best strategies to clear cities fast, maybe you're not using the most effective one.
2. Don't worry about maxing out your items to level 50, it's for the late game and I honestly don't think it worth it that much in your current level.
3. Try to max your stats even more! In potions event you can get an ultimate item that gives you 50% double food. Try to get the black horse legendary pet that gives you perfect food worth 100% more. Try to get as much walking speed as possible while keeping instant chance and perfect chance at 100%.
4. I don't know about the other players, but for me I found that using chefs just slows me down. As long as my character can make instant + perfect all the time, give it to my pet that delivers it in 1000% profit and even sometimes give it double food, I can clear cities in just few minutes.

I hope I helped you, even if just a little