TGs are awesome, I wish I would’ve gone for one when I first got into macro photography! Here’s a couple of observations by @kyronb using the TG-7:
https://www.inaturalist.org/observations/205319650
https://www.inaturalist.org/observations/241214213
Do check out the second photo of the first observation link!
Here’s his setup:
https://bugguide.net/node/view/2288316
I use the Canon EOS Rebel T7 and kit lens for my photos, paired with a ~30mm macro extension tube part and a reverse ring for extra magnification. For proper lighting, I use a flash (although partially broken) and a DIY diffuser to soften the light. TG I think would be better though, because you get slightly more magnification, and because my setup gets a lot of chromatic aberration at high magnifications. Focus stacking is also a must for my setup, since I can’t control aperture. And since I like getting most of the spider in focus, I usually have to stack around 100 images (no examples uploaded yet). If you have an aperture with a lot in focus, focus stacking doesn’t have to be very large at all, even just a couple images will usually do. Stacking can be automatically done through Helicon or Zerene (although these you must purchase), but some softwares like Focus Stacking Online are free (although rather terrible for large stacks).
For focus stacking with setups like mine, you will have to move your camera forward or backward to get all the images you need to stack. If you only need 20-30 images for a stack, a TG will allow focus bracketing, which will move what is in focus for you, so you can keep your camera still rather than moving forward or backward.
If you have a large amount in focus or don’t mind about small depth of field, focus stacking can be completely ignored.