Lets narrow the topic down, are you looking for protection against liquids or can the liquid protection be optional? That will help us recommend something more suited to your needs.
The life proof and atlas both have liquid protection whereas the defender does not. If you can skip the liquid protection but want something beastly, I'd recommend searching for Taktik extreme. The only downfall I've got with mine is selection of headphones as the opening for the headphone jack is made to the apple case design guideline to the letter and finding a cheap pair to fit has proven a challenge for me.
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