I've kept a group of R. Mac Variegated for over three years now. Have stunted it a few times, and it barely survived a couple of "events" I have had over the years.
But all in all, while it is moody, it also offers a fantastic display when it's happy. I look at it as being an early indicator. In general, if it's happy, so are most other plants.
And in the pic above, it looks very happy. I would use it.
Now the Sunset. I get it's rare and difficult, but also don't really know where I would use it.
Yes, I feel the pain of keeping the Macrandra lol. It's really hard to keep it happy for a long time.
In Asia, people have almost no problem growing the plant. Probably because the fertilizers are usually supplied via roots. I've known a guy keeping it under direct sunlight, no co2, no filter, no flow. Just uses super-super-rich substrate and does daily waterchange. And it grows beautifully in such conditions...
In my tank, the sunset is far less of a hassle. It sometimes stunts but never dies. But I've never been able to grow it this big until now. I've heard it likes higher kH water. My tap is super soft.
It's a hard plant to scape IMO. Similar texture to the Tonina Fluviatilis, just different colors. Unfortunately, the color is quite dark. Dark green stem with dark orangeish/reddish leaves. Polished internet photos may show a vibrant color. But in my tank, the plant looks hardly visible if placed near any off-green plants.
IMO, to use it as a group, it needs to be next to or in front of bright green and fine texture groups to make it really visible. This way, the plant is used as a "dark spot" to enhance the contrast of a bright area. Then again, a moss log probably works better for this purpose
Tom Barr used the plant to make a row, which, I think, can be also an effective way to use it.
Great bulb choice, looks amazing
Coming from LED, my eyes still want some green. Couldn't go all colored bulbs like you or Greggz or Dennis