Gear advice

Hi everyone.

I have a 7d mark ii. Wanting to get an r5 soonish.

I need to get back into macro. I have a 70-200 2.8 and a bit super telephoto.

Should i get a lens first before the r5. Also, i have a Ad300 pro off camera strobe. Do you think it’s silly to use the ad300 or should i get an on camera flash with diffusion. I am truly mesmerized by some of these photos and need to get back into macro. Please help with advice !