Standoff destroyers with catfighters and missiles (concussion missiles are good for standoff ranges with no loss of damage at distance) are a viable feline strategy. The question is do you have enough fast transports, troops and a good general to land despite some risk from the defenses and win the planet out from under them (2:1 wouild be good odds, unless the superiority of feline fighters to froggie flipper-floppers is sufficient to make up for numbers). If not, the cautious path is to attack their stations and shipping and try to tease and mousetrap their fleet away from their planet and destroy it.
Strategically, the good frogs evidently have two other races in the far SW cluster to keep an eye on, so unless they are totally secure to their rear don't pose a threat to the Catnip Central Cluster. If the good frogs fall into a war with their neighbors, their worlds might make a tasty treat.
In that central position, the thing to do besides making frog filet of your evil neighbors would be to colonize or at least effectively fully control those few isolated systems between the central and other clusters as well as the gas fields - this ring of islands in the vast empty sea of space between clusters will have great defensive, offensive and trade value and provide the spokes for building the future galactic empire with its hub at the central Catnip capital.
Assuming there is at least one major power to emerge from each cluster, it appears that in the Southeast cluster will be the main threat to you. They may follow the trail of stars to their southwest towards the good frogs, but heading to the center is the natural course and if a single empire holds that large SE cluster it will become fairly strong without any other opponents but you. Find out quickly if there is more than one empire down there, and if so seek to put them at claw and fang with each other until you are ready to step in to conquer one and leave the other at your mercy.
Like the good frogs, empires in the small cluster to your north or the one to the northeast each almost certainly have to worry about other empires in the clusters behind them, meaning they are more likely to be kept busy by nearby empires than risk a push across the circle of emptiness around the center against you with potential enemies behind. Again, controlling the intermediate stars - the whiskers that sense danger and speed a forceful response - will discourage advances against you. These near empires may prove at least temporary allies.
P.S. As the southeast cluster is prey and has a long stringy tail (of stars), I suggest designating it the Mouse Cluster.
< Message edited by Keston -- 12/12/2011 10:28:03 PM >