Don't mine scrypt, mine quark.
ccminer -a quark -o stratum+tcp://yaamp.com:4033 -u <your LTC adress> -p xx
Yaamp is currently paying around 0.4BTC for 1 GHASH of quark
1 750ti OC does 6.5 MHASH in the quark algo
You earn:
0.0065*0.4=0,0026 (btc per day) (0,4355 LTC Per day.) ($0.64 / day)
SCRYPT pays 0.1840 BTC/GHASH
A 750ti is earning as much as a 15MHASH Scrypt ASIC miner with the current prices. (and use 50watt in the wall) (3.33 watt per MHASH (converted to scrypt MHASH))
A used 750ti can be bought for around $100 second hand.
I've been trying to get a perspective on mining profit difference, thx for this