I dived Palau several times when I lived in the area, and the current can change at any minute at any dive site and may even be different where your buddy is. The best thing I learned there is to expect and know how to respond to the danger situations that I have seen EVERY trip (though not every dive):
1) regulator ripped from your mouth in a strong current because you turned your head to look at something.
What you can do: before your dive, or better yet take a refresher course, know how and practice retrieving your regulator by finding where the hose attaches to the 1st stage then snaking down the hose. The "extended arm backstroke" retrieval method just won't work properly when the hose is behind and possibly flying above you. Also practice using your octupus if that's closer/easier.
2) down current coming over the shelf of the reef and pushing you down 40-100 feet in a few seconds.
What you can do: if you're in a blue water safety stop, the quickest way to know this is happening is the building pressure in your ears. Always watch your depth gauge/computer when doing the safety stop. I've had down currents happen to me twice during safety stops and flip me upside down -- try to orient yourself toward the surface, and kick so you rise safely -- your bubbles may be going down so that's not a good reference to watch. If kicking doesn't work, you may have to inflate your BC, BUT AS A LAST RESORT AND BE READY TO DUMP AIR AS SOON AS YOUR DEPTH GAUGE SHOWS THAT YOU'RE RISING MORE THAN A FOOT A SECOND. If the down current hits you when you're near the reef, get as close to the reef as possible and hang on if you can't stop going down even with fin kicks. I've seen divers having to crawl up the reef to get around the current. Not advisable to touch the reef usually, but if your safety/life is at stake, unusual circumstances require unusual responses.
3) mask filling up or ripped from your head in strong current.
Practice your mask clearing and replacement drills, and the best is to avoid looking sideways in a head-on current. Face the current when clearing and replacing your mask, or you may have to repeat what you just did.
4) difficulty detaching from the line of your reef hook because you clipped or securely fastened it to your BC.
It's pretty hard to unclip your reef hook line in a ripping Peleliu current, so try not to clip/tie/fasten it to your BC in the first place. Shops sell reef hooks with handles that look like a small water skiing rope handle. If you ever need to unhook in an emergency, just let go of the handle. If you are tied in to your reef hook and can't get unstuck, keep your dive knife handy and ready to cut.
That said, you may get pleasant conditions on 95% of your dives in Palau. Know your equipment and how to find things with your eyes closed, and that will help you keep your calm so that you can THINK and respond if a situation does occur. I think Sam's Tours does a Blue Corner dive specialty certification, which will teach you how to use the reef hook, inflate/deflate BC so that you "soar" above the reef (actually quite fun) and other techniques for diving that site.
Your mileage may vary. Find a good instructor in Palau to dive with. But it sounds like you have enough experience to at least try Palau.