I'd argue that allowing Eos or Selene any opportunity to actually auto cast anything was the only user error here

In HW I used a Corsair K90 with it's big macro key bank to force mash Embrace on the target of my choice, this was coupled with another macro key that would pause the embrace spam long enough for Whispering Dawn to cast. That paired with habitual /place usage saw me with little to no issues. I will note that in Sol at least, the consensus amongst the SCH mains was that it was better to let Selene autocast her haste buffs. Eos was full manual all the way.

For SB I switched to a K95 and had trouble getting the same macro setup to work so instead bound my arrow keys to gamepad buttons and had the macro keys mash that to drive Embrace spam instead. I distinctly remember not needing a pause macro for WD which is an improvement I guess? I also distinctly remember feeling like I dodged a bullet with my habitual fairy placement micro managing, was an auto following fairy canceling it's casts or something? Dissipation was indeed absolute dogs**** though. I flat out refused to use it or it's opener.

I'm with Roe on Seraph for sure, that thing ate Eos cooldowns for breakfast and I'm glad I stopped bothering with SCH shortly after.