I have been interested in macro since the Fuji X-line came out. I bought the (in)famous XF60, and although it's crazy sharp for portraits, I've never been satisfied with the close-up it produces. About 1 year ago I sold it.
Over the years I also bought the MCEX-11 , the MCEX-16, and the Raynox 150 and 250. Now I get satisfactory results using my X-H1 and the XF50 and XF90 lenses.
I can confirm : prime lenses are much more suited to be used both with extension tubes and Raynox lenses.
With the XF90 I can reach the following magnifications (with good results) :
Lens only Mcex-11 Mcex-16 raynox150 raynox250
0.2 0.3 0.4 0.7 1.0
the best combinations are with Mcex-16 and with raynox150, for the ease of focus and the Dof .