Have fun getting those 4 silvers to get along. People do it, and idk how. I've grown anywhere from two silvers up together, ended up fighting, to 8 silvers together, ended up fighting. And they had plenty of room not to fight. 700+ gals.
it seems that i have read over and over that aros usually end up trying to take each other out. But I would say to atleast give it a try. I have heard of it working out before