"do you have to turn off all ML stuff?"
No, when the raw module is activated it over Ride the H264 recording.
But you use all of the image setting like, magic lantern ISO, etc....
"can you record thru the evf without the back lcd turned on? thanks"
I'm not sure what you are asking here, but i think you what to turn on the
LCD on the back of camera & monitor/Frame with the EVF ?
If So, Yes you can use a EVF off the hdmi port and you can turn on
the lcd in the option for Live View, but i have not done this from my self
I hope i answered your questions. 
Thanks. Looks like my prob may be the card - i did a bench mark on the sandisk extreme and it writes at about 20 mbs (rated for 60 mbs)...looks too slow for raw

ps,,,no I want to turn off the lcd entirely and record thru evf like i do with a mirrorless camera...not poss with 5d it appears.