This seems like a rather new/young tank, which would explain the high alk. With that size tank, I would simply do 15-20% water changes weekly with a quality salt. There's no need to do a water change to lower alk now, that's not going to help, and if you've been dosing any additives/elements for alk/ca, etc, I would stop and let the alk come down on it's own. Pick a salt that mixes to your preferred parameters and stick with it. Once you add in more corals or the current ones start to grow, then I would consider adding/using all for reef as your main elements source. I'm not sure what you're using for testing, but picking up some Hanna testers might be worth it in the long run. You only need 3 of them, alk, ULR phosphate/phosphorus and high range nitrate. I wouldn't worry about mag or calcium, as those numbers are usually within range if you're doing routine water changes, etc. High alk isn't going to do any damage, but trying to correct it quickly and changing it fast will, when making changes, they need to be slow and over time. Unless things are dying, there's no worry or need to change anything now. I've had spikes to 13-15dkh and simply turned off my CaRx and waited for it to come back down, then continued as normal. It's the rapid swings that cause other issues.
Oh, I would probably get rid of the palys in that small of a tank and I would do it carefully.