I’m very stuck and need help!

[MTMedia]

I’m looking to make an upgrade in my camera equipment but am overwhelmed by the choice. I shoot surfing and wave landscapes. I need a camera with great battery life and very durable alongside being a good hybrid for video but mainly photos. Looking at the canon 1dxiii/ii, but really want a mirrorless (for the ibis) that ISNT a Sony as I had one before and didn’t like the ergonomics and don’t trust the durability. Any suggestions? Canon r5 looks great just terrible battery life. Thanks In advance

Ps- I can’t carry two batteries as am out to sea with a surf housing.