I’d trust your LFS. They seem like they are great and err on the side of caution from your comments. I think you could get a pair but do you want a pair?
Here’s some first hand accounts.
Blue throat trigger pair question
Cleaning every day is fine with the skimmer. You mean just cleaning the collection cup right?
as for the triggers I’d add them last IMO. That way you can monitor all other fish and aggression. Then if there’s an issue you know it’s the triggers.