I HAVE NEVER MINED EXPANSE--
But, the responses in this thread indicate that the Expanse (EXP) blockchain has a far lower mining difficulty than Ethereum (ETH), and that EXP mines at a much faster hash rate. How big is the EXP DAG file? Would mining it with a 750ti rig still be practical? --scryptr
The DAG for EXP is running up to 1.8G I think. So you should be good for a little while. After that I would probably start thinking about moving up to something in the 780 line if you have the cash or to SHIFT (SHF) coin.
Also and this is just a theory, you might be able to put 2 or more 750Ti's in SLI mode and mine with that. It never worked out so well with SHA256 or Scrypt based coins but there isnt any technical reason it wouldnt work out for Ethash based coins. But again I dont know of anyone that has actually tried it.