Do you just wear pasties?

Yes, that's what I do. Not a solution for large chested women, but I find these work for me as an average chested woman

Lift: https://b-six.com/products/lifting-nipple-covers

No lift: https://b-six.com/products/creme-silicone-nipple-covers

Oftentimes the issue is less with the pasty and more with the adhesion. Someone recommended skintac adhesive wipes for me, they work very well in extending the life of these and ensuring an extra "stick" throughout the day without damaging my skin.

I swear by Simpatch, with or without SkinTac underneath. My current Dexcom sensor is on day 24, and the Simpatch is still holding strong, with just a bit of one edge coming unglued. I'll either trim it off or stick it back down with some fresh SkinTac, and it'll be fine.

I've seen other folks recommend GrifGrips, Skin Grip, and Fixic, which are also on Amazon.

https://www.amazon.com/Skin-TacTM-Adhesive-Barrier-Wipes-count/dp/B002NSCHY4/ref=asc_df_B002NSCHY4/?tag=hyprod-20&linkCode=df0&hvadid=198081378429&hvpos=&hvnetw=g&hvrand=4408804679696852854&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9029703&hvtargid=pla-380935932948&psc=1

Life saver during the summer.

I buy these, and they work great.

https://www.amazon.com/gp/product/B07FRYY9XP/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I am editing to add that I also use this with it. https://www.amazon.com/gp/product/B002NSCHY4/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1