Since no one else is responding, I'll give you what I've learned. I've just kept this variety of Lion for about a year and just have one group of them--so the little experience is based on that small window--YMMV.
Of all the Cyno forms I keep (and I keep LOT'S of 'em!), these are undoubtable one of (if not the) most aggressive. Even in a well rocked 75 with 2 other aggressive species, the males would go at it with each other until real/significant damage was done. Once I removed all but one male, things settled somewhat for a while. Then the lone male started to go at it with the dom Zebra Long Pelvic and the dom Pundamilia nyererei--both of whom are at least 1.5X his size. I think because of the teeth, the Cyno was able to beat down both the other dom males after multiple jaw-lock sessions. He had over 1/2 of the 75 completely to himself--no one else allowed to cross that line :roll:
I've since moved the 1M/3F group to a 40BR. They've done quite well in the species only setting. The male is not a wife-beater so the femmes are all in good shape and they breed quite regularly. I'd say each female has 25-30 fry every 2-3 months. The females are quite attractive so the species only concept doesn't equal an unattractive tank. Eventually,once some of the juvies grow-out more, I'll have a better idea if the aggro behavior of the adult males that I originally purchased is 'standard' or just something 'learned' by that group.