I was coming from SlimBean 4.2.2
First I backed up everything from the phone to my external SD cad
I flashed el29 booted into recovery
did a factory wipe/reset
wiped cache and dalvik
then formatted SD card ((NOT external)I wanted a fresh clean install)
I then flashed cm-10.2-20131215-NIGHTLY-d710.zip
wiped cache and dalvik and rebooted to the ROM
once I was successfully in 10.2 I then rebooted to recovery and flashed VILLUMINATI-12042013-d710.zip
Then flashed the pa_gapps-modular-full-4.4-20131126-signed.zip
wiped cache and dalvik and rebooted successfully into CM11.
I don't know if the is the "correct" way to do it, or even if it's the safe way to do it, it's just how it worked for me. I'm sure I didn't have to do all of the wipes I did, but if anything it was redundant and not lacking.