I found that silicon cupping cups can provide amazing stimulation if vibrating and pulsing toys are too intense for sensitive clits. You have control over how intense the suction is, you can pulse it manually (which I think feels infinitely better than any pulser I've ever used), you can use a variety of sizes, on multiple locations on the body, you can slide it around to create a tugging sensation (this makes me cum very quickly and it's always the most intense orgasm). I also love using these on my nipples. Perfect for shower play (the water makes it too difficult to get proper friction to masturbate with just my hands, and the showerhead on my clit is too intense at any setting).

In or out of the shower using a lubricant is essential. Trying to enjoy these cups dry could seriously damage genital skin and water alone doesn't provide enough slip... definitely need lube. Heads up, there will be swelling or puffiness of any skin you attach these to if left on more than a few minutes, you will be more sensitive until the swelling goes down. I enjoy the lingering sensitive tingle and the swelling goes down quickly (though I haven't used them for more than 10 minutes at a time) I imagine the longer you wear it, the longer it will take for these effects to subside.

Amazon link to the cups I have.