Also is there any advantage running 1TH miner separately or combining all power together on a solo mining pool vs just the single 4.8Th miner?
Solo mining only. [/b]
Discovering the next block is a game of chance, so whether you use a couple of miners or just a single one, you are going to have to count on chance. It's like throwing a dye and expecting a 6. Someone could get the 6 at the very first attempt while another could fail to get a 6 after 20 attempts