Galapagos photography advice

I'll be headed to the Galapagos in a little over a year to do an 8 day liveaboard. In the lead up to the trip, Im looking for any general advice this group has to offer.

Gear I'll be taking:

Canon r5ii

Nauticam housing

RF 100mm macro

24-50mm + WACP-C

Strobes

A few specific questions I have:

1) Is it worth even taking a macro lens? I know there are some dives that will have nudibranchs, bat fish, etc but it seems risky to dedicate a dive to macro and miss some big animal encounter. Similarly, would the addition of an MFO-3 be useful here to allow some better fish portrait opportunities and more flexibility?

2) The dives with the marine iguanas sound like there will be a lot of surge. From people who have gone to the galapagos, do you recommend leaving the strobes on the boat and shooting available light? or is there value in adding the strobes despite the surge?

3) How do you handle the back-roll entry off the zodiacs, particularly in wolf/darwin with the heavy current? Do you backroll in holding the camera or are you able to have the boat tender hand it to you after entry?

Happy to hear any other helpful tips anyone has to offer. Im starting the planning early so that I'll have plenty of time to practice with any new gear I might need.