It would be a very bad idea to place three Jags in a 110 with large tankmates. It's not only temeperment and territorial disputes that you have to worry about. It's also the quality of your water and the lack of space. There are several cichlids that would do well with a jag given that there is plenty room for territory and swimming. I think you would do ok with a male/female pair. The enjoyment of watching them raise fry is priceless and the babies can be sold, traded, or used as feeders for other fish you may have. A single Jag can be a great showpiece. Keep in mind that these guys can grow 14"+. What you find as empty space now will soon be crammed with too many large cichlids. if you are not planning to upgrade to anything larger, don't get any more large-growing fish. RTC, Oscars, Arowanas are not meant to be housed in a 110 with three jags. Please don't do this unless you are certain that you will upgrade to a much larger tank. You could do a female Festae and one Jag. I would not add a male Festae in a 110 with three Jags. You will have bloodshed for sure.