Tips for making a rainbow tier pet? 🌈💕

I made a couple diamond Frankenkitties and some other tiers when they were brand new but I never got enough for rainbow.

I want to finally try again to get that name tag and was wondering if anyone had any tips? Or also what’s a good pet that sells for around 25-30 each on explorer more often than others? I’m not too picky on what kind of pet at this point just something I can get a lot of for a cheap price, I only have 7k saps atm which I’m sure isn’t enough but I want to start getting some now. I’m sure it’ll take quite awhile so any tips are super appreciated thank you so much! :3