So I am currently switching between LTC/USC and DOGE/USC. But I want to have my cake and eat it too! I want to mine LTC/DOGE/USC all at once! How in the name of all the gods can we make that possible?
Did you get any blocks with DOGE? If you are the first to prove existence of such blocks in the USC blockchain, you get USC 100.
For LTC/DOGE/USC merged mining to happen, either LTC or DOGE needs to accept the 'merged mining as child chain patch'. LTC has little to gain, how the DOGE community feels about it: no idea.