I like your strategy. I always prefer to have some big, heavy firepower fleets slowly moving towards the border worlds an inwards like an unstoppable ood.
My own worlds are heavily fortified by starbase networks, and I know all of their territory. As the main attack commences, I have some fast fleets come in and take the key worlds (all capitals, wonders, goods, and anything +pq25), which normally takes about 5 turns if I've set up alright. After that, they're on their knees, and it's just mopping up. Problem is doing the build up so they don't notice, and then maintaining an army when all the other races in the galaxy eventually gun for me.
