Hey! Personally, I would do a CBO campaign with three ad sets, each ad set with 2 or three ads (depends on the budget you have). One ad can be a carusel type with all those 5-6 products. Another ad can be a Collection Ad with those 5-6 products where you can outline the benefits of each product. You can also test the purchase campaign but optimizing for reach instead of conversions because it lets you promote your products to people no more than once a day, so this can help you in reducing the risk of spamming people. Another thing you can do to reduce the possible high frequency is using the dynamic creative option so Facebook will automatically and continuously combine and find the best options of creatives and copy for your selected audience. I recommend always having a small budget for testing different type of creatives because before putting them into your scaling campaigns, you have to know for sure which are the winners, otherwise you might be losing some of your budget on creatives that dont work