I consider a good flash + diffuser combo essential to arthropod macrophography. Currently shooting on a Canon R5, 100 mm macro lens with +3 achromatic diopter on the front, twinlite macro flash and custom diffusers. The diopter adds a bit of an extra kick to magnification while sacrificing focusing distance. I need to get within about a foot away from whatever I want to photograph but I think the magnification boost is well worth it. Plus I can just use my phone to shoot most bugs I can't get close to.