Is this a terrible fish combo?

[BadPhish]

What do you think of this in a BC14: 1 small perc, 1 firefish, 1 royal gramma

I've got no fish yet and am planning out my "wish list" I'd love to have all these but I'm assuming it's too much. What is your opinion/experience? ...If the general consensus is that it's a bad idea I will probably just go with one perc and one RG...or a pair of percs and a gobi.