I just recently did the exact same thing with SCH last night. I reached 50 on SCH on Saturday, and already have my Omnilex.

I think fate reached out to me for this one. I got down to only needing my Titan kill within one night, then miraculously saw a group in Rev's Toll looking for 1 more person; a SCH healer for Titan. Needless to say, we spanked the fight and I farmed my 900 tomes to finish it off. Felt great.