They do, in fact, get along quite well. http://www.monsterfishkeepers.com/forums/showthread.php?t=293689The male Jag is mild tempered and the female dovii is considerably smaller than him. They are in a 180 w/ tankmates and no casualties so I think a 125 by themselves would be just fine. DO keep a divider handy because, as I've said, the Jag has flipped on his mates in the past. Best of luck with these guys.
Might work since the Dovii is female-I have only had female Dovii and they arent very aggressive-my gets owned by a Trimac, Amarillo-looks like a Barred Midas, and a Xilaoensis-looks like a RD.