Thanks for that info. Out of those host anenomies which are the easier to care for?
Kind of depends, I think it's easier to find a healthy crispa, but personally I think it's easier to control a magnifica if it's a mixed reef, give them a high up perch for max light and not able to touch glass or surounding rockwork and they tend to stay.
The hardest part of keeping mags is getting a healthy one, most newly shipped come w/ bacterial infections requiring cipro treatment, but once you've either overcome that issue or got lucky and avoided alltogether, or bought an established one, I don't think they are that difficult.
Mags are my choice for my perculas, as seen in my avatar I planned and scaped my tank specifically for it, it's right there on left where I put it, and has not moved, makes easy for mixed reef for me.
BTA's wander too much for me, and it may take a long time for them to recognize it.
If I had to choose a non natural alternative, I'd choose LTA or Malu, both stay at sand, and all my percs have accepted both as hosts pretty easily, but of course I do prefer a natural match