I have used Luminar4 as a stand-alone for about 4 months. Very pleased. There are many 1 click fixes and adjustments for photos, but if you're like me and want more control, the editing features are powerful. It uses AI for many of them. I've been pleased with the portrait adjustments, sky replacement (you won't believe it!) and other features. They both have YouTubes that give overviews. Another program to consider, also very powerful that uses AI in a masterful way, is OnOne. It can also be a plugin or stand alone and you buy it, don't "rent it" from Adobe.
Luminar has been updated, for the better, twice since I purchased it in November.

Thank you. She is Indian and it was a Hindu ceremony. The henna artist was an . . . artist. Remarkable to watch

A neighbor recently was married and I had the privilege of attending the henna ceremony. Very intricate. One photo

I agree. Once you start using off camera flash, it takes your photography to a whole new level (David Hobby's Strobist site is inspiring!)

they are generic. Nikon should work fine with them. Same issue though about how to get them to work. I found something in the Comments section of Amazon that got me there.
Oh- AAA batteries. My bad.

If you don't already own these, you might want to consider CowboyStudio FM Radio Triggers. Kit of 1 transmitter and 2 receivers (RPT-04) was under $30 on Amazon. They do the same thing. Screw in securely to camera body and flash. Never had a misfire. AA batteries. Use with my Canon camera and llash.

Flickr has several groups related to this. There are useful suggestions that include many of the suggestions above. They emphasize camera on manual. a good strong flash that is diffused (Lightsphere, StoFen, etc.) slow shutter speed (as slow as 1/10 second) to bring in a lot of ambient light, a low f stop (1.8 or so if your lens allows) and high ISO. Also, if your camera has image stabilization or vibration reduction, turn it off. It slows down and confuses the autofocus.

Here is a comparison of some that you can find on Instructables.com. I have used the "Fong" style filter made with silicone shelf liner from Ikea for years, taking portraits, food pictures and room pictures. I think it's nothing short of wonderful. So if there's an Ikea near you, think about it. Lowe's carries a similar silicone shelf liner. Instructions are clear and simple.
http://www.instructables.com/id/DIFFUSER-comparison/

I also have a (Canon) 50 mm 1.8 from the days when I used a film camera. With the 1.6 crop factor and its tack sharp quality, it gives impressive portrait results. It is not Canon's top of the line lens, but ir is still a remarkable lens.