you want LR and LS in your system whether its in the tank itself or in a refuge of some sort. usually when you see a frag tank with neither of the two in it, these can be found in some other section of the system. ex...fuge, DIY HOB filter,,,,also a little macro in there and you'll have a sufficient frag system...
you can make your own in tank sump basically. this can be done with a piece of plexi glass, power head, tubing to make a spray par, LR and LS, some macro...ive seen them done and look very well also...