I usually combine things. So if I have three new products to test, I add in at least MiMi or Life nearly every time with the new items. If I'm having trouble with the new stuff, I pull out things I know work for me.
My clit usually needs a few sessions with the toy to make friends. Sometimes I even have difficulty coming with a new toy - lower speeds feel like not enough while higher like too much. After 3 or so separate uses the problem disappears. I don't have this issue when it comes to penetrative toys.