My water temperature stays between 78-80 (rarely 82) and all of my shrimp are alive and well. I had a little moment with some Amanos dying off but had kept them for months before just fine with no changes, so no idea what that was. My shrimp LOVEEE blood worms and the fish of course, but my RCS have become more red and the Amanos have become more active. They just love the blood worms, so I'd give them some of those as a treat. I syringe feed my bamboo shrimp blood worms so that's how I found out that they were psychotic for them, the Amanos get on the syringe and pull the blood worms out, ha. Nobody is thrilled with brine shrimp though maybe that's like feeding a pig bacon kinda thing? Heh
Crushed flakes are pretty good, I'm in an anti-flake food phase right now, but I know it works fine. Ghost shrimp are also not algae eaters, some shrimp eat algae more than others and ghosts are not huge fans, they are more like scavengers than anything.
But it sounds like you have it down just fine, so that's just my two cents!