So much depends on the individual fish; but, IMO, if you introduce one juvi and then a second a while later, you'll probably be ok. No guarentee. They could be best buddies, or tear each other apart. Be sure to have plenty of rockwork so they can establish their own territories. I raised an emperor, blue face, and blue girdled in a 180 at the same time. I sure wouldn't advise this, I think I just had a lot of luck. sometimes having a couple other fish, before adding the angel, will be a distraction and will help success. Bold, active "dither" fish are good for this. Bold species of Wrasse are excellent choices.