I tried affinity meme and according to gametora this has 184 affinity and sparks are 7* stam and 7* power and 10 URA sparks total. So it does nothing or calculates wrong? I got better numbers later but not that much better, seen 2 ura sparks activating over 6 inspirations.
I don't think I noticed any difference with just picking something not looking at affinity. Maybe it even got worse.