ltc.ghash.io:3333 I'll give multi a try later.
stratum+tcp://multi.ghash.io:3333 looks good to me.
What's your difficulty? Someone recommended 8192 for the Titan with 4 cubes.
I set mine to 2048, based on the fact that liteguardian has a max difficulty of 1500 and the Titan works perfectly there too.