Thanks for all the great feedback! Since my original post i've been having my concerns about food supply for the mandarin considering the existing canary wrasse. And sadly i am also beginning to feel that other than acting as biological filtration an in-sump fuge isn't good for much.
I agree that any fish can be a jumper if it is spooked. Of course i want to avoid the ones that are the most prone to jumping though.
As for the Azure Damsel, it did have a spat with the royal gramma when the damsel was added to the tank, and then a little standing off with the canary wrasse but the only one who was actually injured from all of it was the azure damsel at the hands of the gramma! So on relative agrresiveness i'm not super worried about the damsel if it's gettin it's a$$ handed to it by a gramma
Once settled in though everybody plays nicely asside from the occasional reminder who's home is who's.